Finding the Fourth Proportional to 2,828.56, 4,243.04 and 748.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,828.56 : 4,243.04 = 748.55 : x
2. Step 2: Convert to fraction form
   2,828.56/4,243.04 = 748.55/x
3. Step 3: Cross multiply
   2,828.56x = 4,243.04 × 748.55
4. Step 4: Simplify right side
   2,828.56x = 3,176,127.59
5. Step 5: Solve for x
   x = 3,176,127.59/2,828.56
6. Step 6: Final answer
   x = 1,122.88