Finding the Fourth Proportional to 12,409.50, 17,118.18 and 7,626.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,409.50 : 17,118.18 = 7,626.13 : x
2. Step 2: Convert to fraction form
   12,409.50/17,118.18 = 7,626.13/x
3. Step 3: Cross multiply
   12,409.50x = 17,118.18 × 7,626.13
4. Step 4: Simplify right side
   12,409.50x = 130,545,466.04
5. Step 5: Solve for x
   x = 130,545,466.04/12,409.50
6. Step 6: Final answer
   x = 10,519.80