Finding the Fourth Proportional to 12,434.28, 17,167.58 and 9,557.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.28 : 17,167.58 = 9,557.91 : x
2. Step 2: Convert to fraction form
   12,434.28/17,167.58 = 9,557.91/x
3. Step 3: Cross multiply
   12,434.28x = 17,167.58 × 9,557.91
4. Step 4: Simplify right side
   12,434.28x = 164,086,136.77
5. Step 5: Solve for x
   x = 164,086,136.77/12,434.28
6. Step 6: Final answer
   x = 13,196.27