Finding the Fourth Proportional to 172,696.86, 258,870.33 and 83,875.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,696.86 : 258,870.33 = 83,875.50 : x
2. Step 2: Convert to fraction form
   172,696.86/258,870.33 = 83,875.50/x
3. Step 3: Cross multiply
   172,696.86x = 258,870.33 × 83,875.50
4. Step 4: Simplify right side
   172,696.86x = 21,712,878,363.92
5. Step 5: Solve for x
   x = 21,712,878,363.92/172,696.86
6. Step 6: Final answer
   x = 125,728.28