Finding the Fourth Proportional to 150,110.50, 207,153.30 and 82,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   150,110.50 : 207,153.30 = 82,128.28 : x
2. Step 2: Convert to fraction form
   150,110.50/207,153.30 = 82,128.28/x
3. Step 3: Cross multiply
   150,110.50x = 207,153.30 × 82,128.28
4. Step 4: Simplify right side
   150,110.50x = 17,013,144,225.32
5. Step 5: Solve for x
   x = 17,013,144,225.32/150,110.50
6. Step 6: Final answer
   x = 113,337.47