Finding the Fourth Proportional to 157,715.10, 217,617.72 and 89,728.10

Step by Step Solution

1. Step 1: Write the proportion equation
   157,715.10 : 217,617.72 = 89,728.10 : x
2. Step 2: Convert to fraction form
   157,715.10/217,617.72 = 89,728.10/x
3. Step 3: Cross multiply
   157,715.10x = 217,617.72 × 89,728.10
4. Step 4: Simplify right side
   157,715.10x = 19,526,425,662.25
5. Step 5: Solve for x
   x = 19,526,425,662.25/157,715.10
6. Step 6: Final answer
   x = 123,808.22