Finding the Fourth Proportional to 12,744.50, 19,116.61 and 8,980.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,744.50 : 19,116.61 = 8,980.81 : x
2. Step 2: Convert to fraction form
   12,744.50/19,116.61 = 8,980.81/x
3. Step 3: Cross multiply
   12,744.50x = 19,116.61 × 8,980.81
4. Step 4: Simplify right side
   12,744.50x = 171,682,572.01
5. Step 5: Solve for x
   x = 171,682,572.01/12,744.50
6. Step 6: Final answer
   x = 13,471.12