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Finding the Fourth Proportional to 520,007,690.40, 780,210,601.20 and 511,846,000.80

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Solution

The fourth proportional to 520,007,690.40, 780,210,601.20 and 511,846,000.80 is: 767,964,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,007,690.40 : 780,210,601.20 = 511,846,000.80 : x
  2. Step 2: Convert to fraction form
    520,007,690.40/780,210,601.20 = 511,846,000.80/x
  3. Step 3: Cross multiply
    520,007,690.40x = 780,210,601.20 × 511,846,000.80
  4. Step 4: Simplify right side
    520,007,690.40x = 399,347,676,005,983,744
  5. Step 5: Solve for x
    x = 399,347,676,005,983,744/520,007,690.40
  6. Step 6: Final answer
    x = 767,964,942.40

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