Finding the Fourth Proportional to 31,160.52, 42,939.72 and 22,192.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,160.52 : 42,939.72 = 22,192.20 : x
2. Step 2: Convert to fraction form
   31,160.52/42,939.72 = 22,192.20/x
3. Step 3: Cross multiply
   31,160.52x = 42,939.72 × 22,192.20
4. Step 4: Simplify right side
   31,160.52x = 952,926,854.18
5. Step 5: Solve for x
   x = 952,926,854.18/31,160.52
6. Step 6: Final answer
   x = 30,581.22