Finding the Fourth Proportional to 2,376.55, 3,566.18 and 915.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,376.55 : 3,566.18 = 915.78 : x
2. Step 2: Convert to fraction form
   2,376.55/3,566.18 = 915.78/x
3. Step 3: Cross multiply
   2,376.55x = 3,566.18 × 915.78
4. Step 4: Simplify right side
   2,376.55x = 3,265,836.32
5. Step 5: Solve for x
   x = 3,265,836.32/2,376.55
6. Step 6: Final answer
   x = 1,374.19