Finding the Fourth Proportional to 78,144.80, 107,839.68 and 42,335.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,144.80 : 107,839.68 = 42,335.71 : x
2. Step 2: Convert to fraction form
   78,144.80/107,839.68 = 42,335.71/x
3. Step 3: Cross multiply
   78,144.80x = 107,839.68 × 42,335.71
4. Step 4: Simplify right side
   78,144.80x = 4,565,468,879.77
5. Step 5: Solve for x
   x = 4,565,468,879.77/78,144.80
6. Step 6: Final answer
   x = 58,423.19