Finding the Fourth Proportional to 2,764.28, 4,146.56 and 915.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.28 : 4,146.56 = 915.59 : x
2. Step 2: Convert to fraction form
   2,764.28/4,146.56 = 915.59/x
3. Step 3: Cross multiply
   2,764.28x = 4,146.56 × 915.59
4. Step 4: Simplify right side
   2,764.28x = 3,796,523.56
5. Step 5: Solve for x
   x = 3,796,523.56/2,764.28
6. Step 6: Final answer
   x = 1,373.42