Finding the Fourth Proportional to 31,020.04, 42,807.22 and 16,872.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,020.04 : 42,807.22 = 16,872.56 : x
2. Step 2: Convert to fraction form
   31,020.04/42,807.22 = 16,872.56/x
3. Step 3: Cross multiply
   31,020.04x = 42,807.22 × 16,872.56
4. Step 4: Simplify right side
   31,020.04x = 722,267,387.88
5. Step 5: Solve for x
   x = 722,267,387.88/31,020.04
6. Step 6: Final answer
   x = 23,283.90