Finding the Fourth Proportional to 99,896.16, 137,868.72 and 64,073.04

Step by Step Solution

1. Step 1: Write the proportion equation
   99,896.16 : 137,868.72 = 64,073.04 : x
2. Step 2: Convert to fraction form
   99,896.16/137,868.72 = 64,073.04/x
3. Step 3: Cross multiply
   99,896.16x = 137,868.72 × 64,073.04
4. Step 4: Simplify right side
   99,896.16x = 8,833,668,011.31
5. Step 5: Solve for x
   x = 8,833,668,011.31/99,896.16
6. Step 6: Final answer
   x = 88,428.50