Finding the Fourth Proportional to 2,510.72, 3,766.40 and 866.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.72 : 3,766.40 = 866.82 : x
2. Step 2: Convert to fraction form
   2,510.72/3,766.40 = 866.82/x
3. Step 3: Cross multiply
   2,510.72x = 3,766.40 × 866.82
4. Step 4: Simplify right side
   2,510.72x = 3,264,786.51
5. Step 5: Solve for x
   x = 3,264,786.51/2,510.72
6. Step 6: Final answer
   x = 1,300.34