Finding the Fourth Proportional to 124,921.72, 172,396.38 and 71,198.06

Step by Step Solution

1. Step 1: Write the proportion equation
   124,921.72 : 172,396.38 = 71,198.06 : x
2. Step 2: Convert to fraction form
   124,921.72/172,396.38 = 71,198.06/x
3. Step 3: Cross multiply
   124,921.72x = 172,396.38 × 71,198.06
4. Step 4: Simplify right side
   124,921.72x = 12,274,287,807.02
5. Step 5: Solve for x
   x = 12,274,287,807.02/124,921.72
6. Step 6: Final answer
   x = 98,255.83