Finding the Fourth Proportional to 78,129.52, 107,818.54 and 42,319.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,129.52 : 107,818.54 = 42,319.62 : x
2. Step 2: Convert to fraction form
   78,129.52/107,818.54 = 42,319.62/x
3. Step 3: Cross multiply
   78,129.52x = 107,818.54 × 42,319.62
4. Step 4: Simplify right side
   78,129.52x = 4,562,839,641.75
5. Step 5: Solve for x
   x = 4,562,839,641.75/78,129.52
6. Step 6: Final answer
   x = 58,400.97