Finding the Fourth Proportional to 1,042.30, 1,561.61 and 748.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.30 : 1,561.61 = 748.37 : x
2. Step 2: Convert to fraction form
   1,042.30/1,561.61 = 748.37/x
3. Step 3: Cross multiply
   1,042.30x = 1,561.61 × 748.37
4. Step 4: Simplify right side
   1,042.30x = 1,168,667.85
5. Step 5: Solve for x
   x = 1,168,667.85/1,042.30
6. Step 6: Final answer
   x = 1,121.24