Finding the Fourth Proportional to 2,666.10, 4,002.06 and 1,107.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.10 : 4,002.06 = 1,107.20 : x
2. Step 2: Convert to fraction form
   2,666.10/4,002.06 = 1,107.20/x
3. Step 3: Cross multiply
   2,666.10x = 4,002.06 × 1,107.20
4. Step 4: Simplify right side
   2,666.10x = 4,431,080.83
5. Step 5: Solve for x
   x = 4,431,080.83/2,666.10
6. Step 6: Final answer
   x = 1,662.01