Finding the Fourth Proportional to 1,626.48, 2,438.90 and 748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,626.48 : 2,438.90 = 748.72 : x
2. Step 2: Convert to fraction form
   1,626.48/2,438.90 = 748.72/x
3. Step 3: Cross multiply
   1,626.48x = 2,438.90 × 748.72
4. Step 4: Simplify right side
   1,626.48x = 1,826,053.21
5. Step 5: Solve for x
   x = 1,826,053.21/1,626.48
6. Step 6: Final answer
   x = 1,122.70