Finding the Fourth Proportional to 125,111.82, 172,611.42 and 71,358.18

Step by Step Solution

1. Step 1: Write the proportion equation
   125,111.82 : 172,611.42 = 71,358.18 : x
2. Step 2: Convert to fraction form
   125,111.82/172,611.42 = 71,358.18/x
3. Step 3: Cross multiply
   125,111.82x = 172,611.42 × 71,358.18
4. Step 4: Simplify right side
   125,111.82x = 12,317,236,778.42
5. Step 5: Solve for x
   x = 12,317,236,778.42/125,111.82
6. Step 6: Final answer
   x = 98,449.82