Finding the Fourth Proportional to 12,370.27, 17,057.24 and 9,531.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,370.27 : 17,057.24 = 9,531.31 : x
2. Step 2: Convert to fraction form
   12,370.27/17,057.24 = 9,531.31/x
3. Step 3: Cross multiply
   12,370.27x = 17,057.24 × 9,531.31
4. Step 4: Simplify right side
   12,370.27x = 162,577,842.18
5. Step 5: Solve for x
   x = 162,577,842.18/12,370.27
6. Step 6: Final answer
   x = 13,142.63