Finding the Fourth Proportional to 128,082.10, 192,123.15 and 88,716.10

Step by Step Solution

1. Step 1: Write the proportion equation
   128,082.10 : 192,123.15 = 88,716.10 : x
2. Step 2: Convert to fraction form
   128,082.10/192,123.15 = 88,716.10/x
3. Step 3: Cross multiply
   128,082.10x = 192,123.15 × 88,716.10
4. Step 4: Simplify right side
   128,082.10x = 17,044,416,587.72
5. Step 5: Solve for x
   x = 17,044,416,587.72/128,082.10
6. Step 6: Final answer
   x = 133,074.15