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Finding the Fourth Proportional to 1,318,915.60, 1,978,891.80 and 520,061.20

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Solution

The fourth proportional to 1,318,915.60, 1,978,891.80 and 520,061.20 is: 780,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,915.60 : 1,978,891.80 = 520,061.20 : x
  2. Step 2: Convert to fraction form
    1,318,915.60/1,978,891.80 = 520,061.20/x
  3. Step 3: Cross multiply
    1,318,915.60x = 1,978,891.80 × 520,061.20
  4. Step 4: Simplify right side
    1,318,915.60x = 1,029,144,844,178.16
  5. Step 5: Solve for x
    x = 1,029,144,844,178.16/1,318,915.60
  6. Step 6: Final answer
    x = 780,296.21

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