Finding the Fourth Proportional to 2,666.17, 3,998.58 and 1,022.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.17 : 3,998.58 = 1,022.23 : x
2. Step 2: Convert to fraction form
   2,666.17/3,998.58 = 1,022.23/x
3. Step 3: Cross multiply
   2,666.17x = 3,998.58 × 1,022.23
4. Step 4: Simplify right side
   2,666.17x = 4,087,468.43
5. Step 5: Solve for x
   x = 4,087,468.43/2,666.17
6. Step 6: Final answer
   x = 1,533.09