Finding the Fourth Proportional to 2,622.24, 3,933.61 and 866.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.24 : 3,933.61 = 866.72 : x
2. Step 2: Convert to fraction form
   2,622.24/3,933.61 = 866.72/x
3. Step 3: Cross multiply
   2,622.24x = 3,933.61 × 866.72
4. Step 4: Simplify right side
   2,622.24x = 3,409,346.13
5. Step 5: Solve for x
   x = 3,409,346.13/2,622.24
6. Step 6: Final answer
   x = 1,300.17