Finding the Fourth Proportional to 269,128.50, 371,397.33 and 149,896.50

Step by Step Solution

1. Step 1: Write the proportion equation
   269,128.50 : 371,397.33 = 149,896.50 : x
2. Step 2: Convert to fraction form
   269,128.50/371,397.33 = 149,896.50/x
3. Step 3: Cross multiply
   269,128.50x = 371,397.33 × 149,896.50
4. Step 4: Simplify right side
   269,128.50x = 55,671,159,876.35
5. Step 5: Solve for x
   x = 55,671,159,876.35/269,128.50
6. Step 6: Final answer
   x = 206,857.17