Finding the Fourth Proportional to 72,616.89, 108,943.82 and 42,656.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72,616.89 : 108,943.82 = 42,656.47 : x
2. Step 2: Convert to fraction form
   72,616.89/108,943.82 = 42,656.47/x
3. Step 3: Cross multiply
   72,616.89x = 108,943.82 × 42,656.47
4. Step 4: Simplify right side
   72,616.89x = 4,647,158,789.52
5. Step 5: Solve for x
   x = 4,647,158,789.52/72,616.89
6. Step 6: Final answer
   x = 63,995.56