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Finding the Fourth Proportional to 78,587.09, 117,879.47 and 19,422.75

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Solution

The fourth proportional to 78,587.09, 117,879.47 and 19,422.75 is: 29,133.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.09 : 117,879.47 = 19,422.75 : x
  2. Step 2: Convert to fraction form
    78,587.09/117,879.47 = 19,422.75/x
  3. Step 3: Cross multiply
    78,587.09x = 117,879.47 × 19,422.75
  4. Step 4: Simplify right side
    78,587.09x = 2,289,543,378.83
  5. Step 5: Solve for x
    x = 2,289,543,378.83/78,587.09
  6. Step 6: Final answer
    x = 29,133.84

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