Finding the Fourth Proportional to 12,260.06, 18,399.33 and 8,981.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,260.06 : 18,399.33 = 8,981.57 : x
2. Step 2: Convert to fraction form
   12,260.06/18,399.33 = 8,981.57/x
3. Step 3: Cross multiply
   12,260.06x = 18,399.33 × 8,981.57
4. Step 4: Simplify right side
   12,260.06x = 165,254,870.35
5. Step 5: Solve for x
   x = 165,254,870.35/12,260.06
6. Step 6: Final answer
   x = 13,479.12