Finding the Fourth Proportional to 12,428.34, 17,157.46 and 9,589.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,428.34 : 17,157.46 = 9,589.33 : x
2. Step 2: Convert to fraction form
   12,428.34/17,157.46 = 9,589.33/x
3. Step 3: Cross multiply
   12,428.34x = 17,157.46 × 9,589.33
4. Step 4: Simplify right side
   12,428.34x = 164,528,545.90
5. Step 5: Solve for x
   x = 164,528,545.90/12,428.34
6. Step 6: Final answer
   x = 13,238.18