Finding the Fourth Proportional to 78,691.57, 108,594.37 and 42,881.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,691.57 : 108,594.37 = 42,881.57 : x
2. Step 2: Convert to fraction form
   78,691.57/108,594.37 = 42,881.57/x
3. Step 3: Cross multiply
   78,691.57x = 108,594.37 × 42,881.57
4. Step 4: Simplify right side
   78,691.57x = 4,656,696,321.38
5. Step 5: Solve for x
   x = 4,656,696,321.38/78,691.57
6. Step 6: Final answer
   x = 59,176.56