Finding the Fourth Proportional to 78,767.18, 108,696.32 and 42,957.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,767.18 : 108,696.32 = 42,957.90 : x
2. Step 2: Convert to fraction form
   78,767.18/108,696.32 = 42,957.90/x
3. Step 3: Cross multiply
   78,767.18x = 108,696.32 × 42,957.90
4. Step 4: Simplify right side
   78,767.18x = 4,669,365,644.93
5. Step 5: Solve for x
   x = 4,669,365,644.93/78,767.18
6. Step 6: Final answer
   x = 59,280.60