Finding the Fourth Proportional to 64,398.76, 88,908.42 and 40,545.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,398.76 : 88,908.42 = 40,545.88 : x
2. Step 2: Convert to fraction form
   64,398.76/88,908.42 = 40,545.88/x
3. Step 3: Cross multiply
   64,398.76x = 88,908.42 × 40,545.88
4. Step 4: Simplify right side
   64,398.76x = 3,604,870,128.31
5. Step 5: Solve for x
   x = 3,604,870,128.31/64,398.76
6. Step 6: Final answer
   x = 55,977.32