Finding the Fourth Proportional to 171,131.92, 256,588.50 and 82,208.50

Step by Step Solution

1. Step 1: Write the proportion equation
   171,131.92 : 256,588.50 = 82,208.50 : x
2. Step 2: Convert to fraction form
   171,131.92/256,588.50 = 82,208.50/x
3. Step 3: Cross multiply
   171,131.92x = 256,588.50 × 82,208.50
4. Step 4: Simplify right side
   171,131.92x = 21,093,755,702.25
5. Step 5: Solve for x
   x = 21,093,755,702.25/171,131.92
6. Step 6: Final answer
   x = 123,260.21