Finding the Fourth Proportional to 2,621.24, 3,932.50 and 866.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.24 : 3,932.50 = 866.35 : x
2. Step 2: Convert to fraction form
   2,621.24/3,932.50 = 866.35/x
3. Step 3: Cross multiply
   2,621.24x = 3,932.50 × 866.35
4. Step 4: Simplify right side
   2,621.24x = 3,406,921.38
5. Step 5: Solve for x
   x = 3,406,921.38/2,621.24
6. Step 6: Final answer
   x = 1,299.74