Finding the Fourth Proportional to 172,697.86, 258,871.83 and 83,876.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,697.86 : 258,871.83 = 83,876.50 : x
2. Step 2: Convert to fraction form
   172,697.86/258,871.83 = 83,876.50/x
3. Step 3: Cross multiply
   172,697.86x = 258,871.83 × 83,876.50
4. Step 4: Simplify right side
   172,697.86x = 21,713,263,049.00
5. Step 5: Solve for x
   x = 21,713,263,049.00/172,697.86
6. Step 6: Final answer
   x = 125,729.77