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Finding the Fourth Proportional to 40,791.87, 61,138.60 and 21,059.66

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Solution

The fourth proportional to 40,791.87, 61,138.60 and 21,059.66 is: 31,564.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,791.87 : 61,138.60 = 21,059.66 : x
  2. Step 2: Convert to fraction form
    40,791.87/61,138.60 = 21,059.66/x
  3. Step 3: Cross multiply
    40,791.87x = 61,138.60 × 21,059.66
  4. Step 4: Simplify right side
    40,791.87x = 1,287,558,229.07
  5. Step 5: Solve for x
    x = 1,287,558,229.07/40,791.87
  6. Step 6: Final answer
    x = 31,564.09

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