Finding the Fourth Proportional to 16,781.31, 23,158.17 and 9,228.11

Step by Step Solution

1. Step 1: Write the proportion equation
   16,781.31 : 23,158.17 = 9,228.11 : x
2. Step 2: Convert to fraction form
   16,781.31/23,158.17 = 9,228.11/x
3. Step 3: Cross multiply
   16,781.31x = 23,158.17 × 9,228.11
4. Step 4: Simplify right side
   16,781.31x = 213,706,024.37
5. Step 5: Solve for x
   x = 213,706,024.37/16,781.31
6. Step 6: Final answer
   x = 12,734.76