Finding the Fourth Proportional to 78,591.63, 108,456.87 and 42,781.95

Step by Step Solution

1. Step 1: Write the proportion equation
   78,591.63 : 108,456.87 = 42,781.95 : x
2. Step 2: Convert to fraction form
   78,591.63/108,456.87 = 42,781.95/x
3. Step 3: Cross multiply
   78,591.63x = 108,456.87 × 42,781.95
4. Step 4: Simplify right side
   78,591.63x = 4,639,996,389.50
5. Step 5: Solve for x
   x = 4,639,996,389.50/78,591.63
6. Step 6: Final answer
   x = 59,039.32