Finding the Fourth Proportional to 10,980.10, 16,470.19 and 2,660.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,980.10 : 16,470.19 = 2,660.10 : x
2. Step 2: Convert to fraction form
   10,980.10/16,470.19 = 2,660.10/x
3. Step 3: Cross multiply
   10,980.10x = 16,470.19 × 2,660.10
4. Step 4: Simplify right side
   10,980.10x = 43,812,256.77
5. Step 5: Solve for x
   x = 43,812,256.77/10,980.10
6. Step 6: Final answer
   x = 3,990.15