Finding the Fourth Proportional to 2,327.86, 3,490.17 and 866.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,327.86 : 3,490.17 = 866.62 : x
2. Step 2: Convert to fraction form
   2,327.86/3,490.17 = 866.62/x
3. Step 3: Cross multiply
   2,327.86x = 3,490.17 × 866.62
4. Step 4: Simplify right side
   2,327.86x = 3,024,651.13
5. Step 5: Solve for x
   x = 3,024,651.13/2,327.86
6. Step 6: Final answer
   x = 1,299.33