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Finding the Fourth Proportional to 78,320.63, 108,079.58 and 42,509.87

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Solution

The fourth proportional to 78,320.63, 108,079.58 and 42,509.87 is: 58,662.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,320.63 : 108,079.58 = 42,509.87 : x
  2. Step 2: Convert to fraction form
    78,320.63/108,079.58 = 42,509.87/x
  3. Step 3: Cross multiply
    78,320.63x = 108,079.58 × 42,509.87
  4. Step 4: Simplify right side
    78,320.63x = 4,594,448,628.78
  5. Step 5: Solve for x
    x = 4,594,448,628.78/78,320.63
  6. Step 6: Final answer
    x = 58,662.05

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