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Finding the Fourth Proportional to 519,817.78, 778,640.00 and 418,065.89

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Solution

The fourth proportional to 519,817.78, 778,640.00 and 418,065.89 is: 626,224.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,817.78 : 778,640.00 = 418,065.89 : x
  2. Step 2: Convert to fraction form
    519,817.78/778,640.00 = 418,065.89/x
  3. Step 3: Cross multiply
    519,817.78x = 778,640.00 × 418,065.89
  4. Step 4: Simplify right side
    519,817.78x = 325,522,829,210.33
  5. Step 5: Solve for x
    x = 325,522,829,210.33/519,817.78
  6. Step 6: Final answer
    x = 626,224.89

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