Finding the Fourth Proportional to 31,012.54, 42,797.19 and 16,865.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.54 : 42,797.19 = 16,865.38 : x
2. Step 2: Convert to fraction form
   31,012.54/42,797.19 = 16,865.38/x
3. Step 3: Cross multiply
   31,012.54x = 42,797.19 × 16,865.38
4. Step 4: Simplify right side
   31,012.54x = 721,790,989.02
5. Step 5: Solve for x
   x = 721,790,989.02/31,012.54
6. Step 6: Final answer
   x = 23,274.17