Finding the Fourth Proportional to 12,434.57, 17,156.31 and 8,653.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.57 : 17,156.31 = 8,653.49 : x
2. Step 2: Convert to fraction form
   12,434.57/17,156.31 = 8,653.49/x
3. Step 3: Cross multiply
   12,434.57x = 17,156.31 × 8,653.49
4. Step 4: Simplify right side
   12,434.57x = 148,461,957.02
5. Step 5: Solve for x
   x = 148,461,957.02/12,434.57
6. Step 6: Final answer
   x = 11,939.45