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Finding the Fourth Proportional to 78,719.69, 108,634.32 and 42,909.72

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Solution

The fourth proportional to 78,719.69, 108,634.32 and 42,909.72 is: 59,216.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.69 : 108,634.32 = 42,909.72 : x
  2. Step 2: Convert to fraction form
    78,719.69/108,634.32 = 42,909.72/x
  3. Step 3: Cross multiply
    78,719.69x = 108,634.32 × 42,909.72
  4. Step 4: Simplify right side
    78,719.69x = 4,661,467,846.21
  5. Step 5: Solve for x
    x = 4,661,467,846.21/78,719.69
  6. Step 6: Final answer
    x = 59,216.03

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