Finding the Fourth Proportional to 128,757, 192,910.29 and 89,339.16

Step by Step Solution

1. Step 1: Write the proportion equation
   128,757 : 192,910.29 = 89,339.16 : x
2. Step 2: Convert to fraction form
   128,757/192,910.29 = 89,339.16/x
3. Step 3: Cross multiply
   128,757x = 192,910.29 × 89,339.16
4. Step 4: Simplify right side
   128,757x = 17,234,443,263.96
5. Step 5: Solve for x
   x = 17,234,443,263.96/128,757
6. Step 6: Final answer
   x = 133,852.48