Finding the Fourth Proportional to 9,022.31, 13,456.58 and 8,457.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,022.31 : 13,456.58 = 8,457.17 : x
2. Step 2: Convert to fraction form
   9,022.31/13,456.58 = 8,457.17/x
3. Step 3: Cross multiply
   9,022.31x = 13,456.58 × 8,457.17
4. Step 4: Simplify right side
   9,022.31x = 113,804,617.30
5. Step 5: Solve for x
   x = 113,804,617.30/9,022.31
6. Step 6: Final answer
   x = 12,613.69