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Finding the Fourth Proportional to 78,506.24, 108,339.12 and 42,696.64

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Solution

The fourth proportional to 78,506.24, 108,339.12 and 42,696.64 is: 58,921.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,506.24 : 108,339.12 = 42,696.64 : x
  2. Step 2: Convert to fraction form
    78,506.24/108,339.12 = 42,696.64/x
  3. Step 3: Cross multiply
    78,506.24x = 108,339.12 × 42,696.64
  4. Step 4: Simplify right side
    78,506.24x = 4,625,716,404.56
  5. Step 5: Solve for x
    x = 4,625,716,404.56/78,506.24
  6. Step 6: Final answer
    x = 58,921.64

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