Finding the Fourth Proportional to 2,666.66, 3,997.29 and 1,107.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.66 : 3,997.29 = 1,107.53 : x
2. Step 2: Convert to fraction form
   2,666.66/3,997.29 = 1,107.53/x
3. Step 3: Cross multiply
   2,666.66x = 3,997.29 × 1,107.53
4. Step 4: Simplify right side
   2,666.66x = 4,427,118.59
5. Step 5: Solve for x
   x = 4,427,118.59/2,666.66
6. Step 6: Final answer
   x = 1,660.17