Finding the Fourth Proportional to 31,146.24, 42,981.24 and 16,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,146.24 : 42,981.24 = 16,998.72 : x
2. Step 2: Convert to fraction form
   31,146.24/42,981.24 = 16,998.72/x
3. Step 3: Cross multiply
   31,146.24x = 42,981.24 × 16,998.72
4. Step 4: Simplify right side
   31,146.24x = 730,626,064.01
5. Step 5: Solve for x
   x = 730,626,064.01/31,146.24
6. Step 6: Final answer
   x = 23,457.92