Finding the Fourth Proportional to 72,617.89, 108,945.32 and 42,657.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72,617.89 : 108,945.32 = 42,657.47 : x
2. Step 2: Convert to fraction form
   72,617.89/108,945.32 = 42,657.47/x
3. Step 3: Cross multiply
   72,617.89x = 108,945.32 × 42,657.47
4. Step 4: Simplify right side
   72,617.89x = 4,647,331,719.54
5. Step 5: Solve for x
   x = 4,647,331,719.54/72,617.89
6. Step 6: Final answer
   x = 63,997.06