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Finding the Fourth Proportional to 520,036.30, 780,054.45 and 425,557.90

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Solution

The fourth proportional to 520,036.30, 780,054.45 and 425,557.90 is: 638,336.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,036.30 : 780,054.45 = 425,557.90 : x
  2. Step 2: Convert to fraction form
    520,036.30/780,054.45 = 425,557.90/x
  3. Step 3: Cross multiply
    520,036.30x = 780,054.45 × 425,557.90
  4. Step 4: Simplify right side
    520,036.30x = 331,958,333,627.66
  5. Step 5: Solve for x
    x = 331,958,333,627.66/520,036.30
  6. Step 6: Final answer
    x = 638,336.85

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