Finding the Fourth Proportional to 2,764.89, 4,146.30 and 915.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.89 : 4,146.30 = 915.48 : x
2. Step 2: Convert to fraction form
   2,764.89/4,146.30 = 915.48/x
3. Step 3: Cross multiply
   2,764.89x = 4,146.30 × 915.48
4. Step 4: Simplify right side
   2,764.89x = 3,795,854.72
5. Step 5: Solve for x
   x = 3,795,854.72/2,764.89
6. Step 6: Final answer
   x = 1,372.88