Finding the Fourth Proportional to 2,624.24, 3,936.61 and 868.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.24 : 3,936.61 = 868.72 : x
2. Step 2: Convert to fraction form
   2,624.24/3,936.61 = 868.72/x
3. Step 3: Cross multiply
   2,624.24x = 3,936.61 × 868.72
4. Step 4: Simplify right side
   2,624.24x = 3,419,811.84
5. Step 5: Solve for x
   x = 3,419,811.84/2,624.24
6. Step 6: Final answer
   x = 1,303.16