Finding the Fourth Proportional to 112,687.96, 155,509.12 and 64,940.88

Step by Step Solution

1. Step 1: Write the proportion equation
   112,687.96 : 155,509.12 = 64,940.88 : x
2. Step 2: Convert to fraction form
   112,687.96/155,509.12 = 64,940.88/x
3. Step 3: Cross multiply
   112,687.96x = 155,509.12 × 64,940.88
4. Step 4: Simplify right side
   112,687.96x = 10,098,899,100.83
5. Step 5: Solve for x
   x = 10,098,899,100.83/112,687.96
6. Step 6: Final answer
   x = 89,618.26