Finding the Fourth Proportional to 2,800.52, 4,200.80 and 748.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.52 : 4,200.80 = 748.52 : x
2. Step 2: Convert to fraction form
   2,800.52/4,200.80 = 748.52/x
3. Step 3: Cross multiply
   2,800.52x = 4,200.80 × 748.52
4. Step 4: Simplify right side
   2,800.52x = 3,144,382.82
5. Step 5: Solve for x
   x = 3,144,382.82/2,800.52
6. Step 6: Final answer
   x = 1,122.79