Finding the Fourth Proportional to 115,516.28, 159,412.42 and 65,215.32

Step by Step Solution

1. Step 1: Write the proportion equation
   115,516.28 : 159,412.42 = 65,215.32 : x
2. Step 2: Convert to fraction form
   115,516.28/159,412.42 = 65,215.32/x
3. Step 3: Cross multiply
   115,516.28x = 159,412.42 × 65,215.32
4. Step 4: Simplify right side
   115,516.28x = 10,396,131,982.27
5. Step 5: Solve for x
   x = 10,396,131,982.27/115,516.28
6. Step 6: Final answer
   x = 89,997.12