Finding the Fourth Proportional to 2,396.78, 3,595.20 and 916.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,396.78 : 3,595.20 = 916.10 : x
2. Step 2: Convert to fraction form
   2,396.78/3,595.20 = 916.10/x
3. Step 3: Cross multiply
   2,396.78x = 3,595.20 × 916.10
4. Step 4: Simplify right side
   2,396.78x = 3,293,562.72
5. Step 5: Solve for x
   x = 3,293,562.72/2,396.78
6. Step 6: Final answer
   x = 1,374.16