Finding the Fourth Proportional to 2,391.96, 3,588.21 and 748.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.96 : 3,588.21 = 748.47 : x
2. Step 2: Convert to fraction form
   2,391.96/3,588.21 = 748.47/x
3. Step 3: Cross multiply
   2,391.96x = 3,588.21 × 748.47
4. Step 4: Simplify right side
   2,391.96x = 2,685,667.54
5. Step 5: Solve for x
   x = 2,685,667.54/2,391.96
6. Step 6: Final answer
   x = 1,122.79