Finding the Fourth Proportional to 2,510.58, 3,765.15 and 866.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.58 : 3,765.15 = 866.70 : x
2. Step 2: Convert to fraction form
   2,510.58/3,765.15 = 866.70/x
3. Step 3: Cross multiply
   2,510.58x = 3,765.15 × 866.70
4. Step 4: Simplify right side
   2,510.58x = 3,263,255.51
5. Step 5: Solve for x
   x = 3,263,255.51/2,510.58
6. Step 6: Final answer
   x = 1,299.80