Finding the Fourth Proportional to 31,331.42, 43,238.31 and 17,185.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,331.42 : 43,238.31 = 17,185.22 : x
2. Step 2: Convert to fraction form
   31,331.42/43,238.31 = 17,185.22/x
3. Step 3: Cross multiply
   31,331.42x = 43,238.31 × 17,185.22
4. Step 4: Simplify right side
   31,331.42x = 743,059,869.78
5. Step 5: Solve for x
   x = 743,059,869.78/31,331.42
6. Step 6: Final answer
   x = 23,716.12