Finding the Fourth Proportional to 64,111.28, 88,384.60 and 55,253.12

Step by Step Solution

1. Step 1: Write the proportion equation
   64,111.28 : 88,384.60 = 55,253.12 : x
2. Step 2: Convert to fraction form
   64,111.28/88,384.60 = 55,253.12/x
3. Step 3: Cross multiply
   64,111.28x = 88,384.60 × 55,253.12
4. Step 4: Simplify right side
   64,111.28x = 4,883,524,909.95
5. Step 5: Solve for x
   x = 4,883,524,909.95/64,111.28
6. Step 6: Final answer
   x = 76,172.63