Finding the Fourth Proportional to 10,981.10, 16,471.69 and 2,661.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.10 : 16,471.69 = 2,661.10 : x
2. Step 2: Convert to fraction form
   10,981.10/16,471.69 = 2,661.10/x
3. Step 3: Cross multiply
   10,981.10x = 16,471.69 × 2,661.10
4. Step 4: Simplify right side
   10,981.10x = 43,832,814.26
5. Step 5: Solve for x
   x = 43,832,814.26/10,981.10
6. Step 6: Final answer
   x = 3,991.66