Finding the Fourth Proportional to 128,329.57, 192,425.05 and 90,962.83

Step by Step Solution

1. Step 1: Write the proportion equation
   128,329.57 : 192,425.05 = 90,962.83 : x
2. Step 2: Convert to fraction form
   128,329.57/192,425.05 = 90,962.83/x
3. Step 3: Cross multiply
   128,329.57x = 192,425.05 × 90,962.83
4. Step 4: Simplify right side
   128,329.57x = 17,503,527,110.89
5. Step 5: Solve for x
   x = 17,503,527,110.89/128,329.57
6. Step 6: Final answer
   x = 136,395.12