Finding the Fourth Proportional to 2,510.74, 3,764.89 and 866.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.74 : 3,764.89 = 866.71 : x
2. Step 2: Convert to fraction form
   2,510.74/3,764.89 = 866.71/x
3. Step 3: Cross multiply
   2,510.74x = 3,764.89 × 866.71
4. Step 4: Simplify right side
   2,510.74x = 3,263,046.82
5. Step 5: Solve for x
   x = 3,263,046.82/2,510.74
6. Step 6: Final answer
   x = 1,299.64