Finding the Fourth Proportional to 1,648.46, 2,467.89 and 866.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.46 : 2,467.89 = 866.61 : x
2. Step 2: Convert to fraction form
   1,648.46/2,467.89 = 866.61/x
3. Step 3: Cross multiply
   1,648.46x = 2,467.89 × 866.61
4. Step 4: Simplify right side
   1,648.46x = 2,138,698.15
5. Step 5: Solve for x
   x = 2,138,698.15/1,648.46
6. Step 6: Final answer
   x = 1,297.39