Finding the Fourth Proportional to 2,328.51, 3,491.55 and 866.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.51 : 3,491.55 = 866.88 : x
2. Step 2: Convert to fraction form
   2,328.51/3,491.55 = 866.88/x
3. Step 3: Cross multiply
   2,328.51x = 3,491.55 × 866.88
4. Step 4: Simplify right side
   2,328.51x = 3,026,754.86
5. Step 5: Solve for x
   x = 3,026,754.86/2,328.51
6. Step 6: Final answer
   x = 1,299.87