Finding the Fourth Proportional to 124,729.31, 172,134.38 and 71,019.02

Step by Step Solution

1. Step 1: Write the proportion equation
   124,729.31 : 172,134.38 = 71,019.02 : x
2. Step 2: Convert to fraction form
   124,729.31/172,134.38 = 71,019.02/x
3. Step 3: Cross multiply
   124,729.31x = 172,134.38 × 71,019.02
4. Step 4: Simplify right side
   124,729.31x = 12,224,814,975.91
5. Step 5: Solve for x
   x = 12,224,814,975.91/124,729.31
6. Step 6: Final answer
   x = 98,010.76