Finding the Fourth Proportional to 64,061.92, 88,356.80 and 55,124.40

Step by Step Solution

1. Step 1: Write the proportion equation
   64,061.92 : 88,356.80 = 55,124.40 : x
2. Step 2: Convert to fraction form
   64,061.92/88,356.80 = 55,124.40/x
3. Step 3: Cross multiply
   64,061.92x = 88,356.80 × 55,124.40
4. Step 4: Simplify right side
   64,061.92x = 4,870,615,585.92
5. Step 5: Solve for x
   x = 4,870,615,585.92/64,061.92
6. Step 6: Final answer
   x = 76,029.81