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Finding the Fourth Proportional to 722,109.78, 996,542.60 and 399,819.83

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Solution

The fourth proportional to 722,109.78, 996,542.60 and 399,819.83 is: 551,768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,109.78 : 996,542.60 = 399,819.83 : x
  2. Step 2: Convert to fraction form
    722,109.78/996,542.60 = 399,819.83/x
  3. Step 3: Cross multiply
    722,109.78x = 996,542.60 × 399,819.83
  4. Step 4: Simplify right side
    722,109.78x = 398,437,485,937.95
  5. Step 5: Solve for x
    x = 398,437,485,937.95/722,109.78
  6. Step 6: Final answer
    x = 551,768.58

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