Finding the Fourth Proportional to 2,666.34, 3,993.32 and 2,574.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.34 : 3,993.32 = 2,574.06 : x
2. Step 2: Convert to fraction form
   2,666.34/3,993.32 = 2,574.06/x
3. Step 3: Cross multiply
   2,666.34x = 3,993.32 × 2,574.06
4. Step 4: Simplify right side
   2,666.34x = 10,279,045.28
5. Step 5: Solve for x
   x = 10,279,045.28/2,666.34
6. Step 6: Final answer
   x = 3,855.11