Finding the Fourth Proportional to 78,766.60, 108,699.30 and 42,957.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,766.60 : 108,699.30 = 42,957.92 : x
2. Step 2: Convert to fraction form
   78,766.60/108,699.30 = 42,957.92/x
3. Step 3: Cross multiply
   78,766.60x = 108,699.30 × 42,957.92
4. Step 4: Simplify right side
   78,766.60x = 4,669,495,833.46
5. Step 5: Solve for x
   x = 4,669,495,833.46/78,766.60
6. Step 6: Final answer
   x = 59,282.69