Finding the Fourth Proportional to 2,511.72, 3,767.86 and 868.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,511.72 : 3,767.86 = 868.08 : x
2. Step 2: Convert to fraction form
   2,511.72/3,767.86 = 868.08/x
3. Step 3: Cross multiply
   2,511.72x = 3,767.86 × 868.08
4. Step 4: Simplify right side
   2,511.72x = 3,270,803.91
5. Step 5: Solve for x
   x = 3,270,803.91/2,511.72
6. Step 6: Final answer
   x = 1,302.22