Finding the Fourth Proportional to 2,610.78, 3,915.96 and 966.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.78 : 3,915.96 = 966.56 : x
2. Step 2: Convert to fraction form
   2,610.78/3,915.96 = 966.56/x
3. Step 3: Cross multiply
   2,610.78x = 3,915.96 × 966.56
4. Step 4: Simplify right side
   2,610.78x = 3,785,010.30
5. Step 5: Solve for x
   x = 3,785,010.30/2,610.78
6. Step 6: Final answer
   x = 1,449.76