Finding the Fourth Proportional to 124,786.55, 172,236.06 and 71,103.30

Step by Step Solution

1. Step 1: Write the proportion equation
   124,786.55 : 172,236.06 = 71,103.30 : x
2. Step 2: Convert to fraction form
   124,786.55/172,236.06 = 71,103.30/x
3. Step 3: Cross multiply
   124,786.55x = 172,236.06 × 71,103.30
4. Step 4: Simplify right side
   124,786.55x = 12,246,551,725.53
5. Step 5: Solve for x
   x = 12,246,551,725.53/124,786.55
6. Step 6: Final answer
   x = 98,139.99