Finding the Fourth Proportional to 12,398.10, 17,116.05 and 9,559.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,398.10 : 17,116.05 = 9,559.25 : x
2. Step 2: Convert to fraction form
   12,398.10/17,116.05 = 9,559.25/x
3. Step 3: Cross multiply
   12,398.10x = 17,116.05 × 9,559.25
4. Step 4: Simplify right side
   12,398.10x = 163,616,515.38
5. Step 5: Solve for x
   x = 163,616,515.38/12,398.10
6. Step 6: Final answer
   x = 13,196.90