Finding the Fourth Proportional to 2,763.72, 4,145.91 and 915.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,763.72 : 4,145.91 = 915.03 : x
2. Step 2: Convert to fraction form
   2,763.72/4,145.91 = 915.03/x
3. Step 3: Cross multiply
   2,763.72x = 4,145.91 × 915.03
4. Step 4: Simplify right side
   2,763.72x = 3,793,632.03
5. Step 5: Solve for x
   x = 3,793,632.03/2,763.72
6. Step 6: Final answer
   x = 1,372.65