Finding the Fourth Proportional to 2,391.50, 3,587.76 and 725.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.50 : 3,587.76 = 725.48 : x
2. Step 2: Convert to fraction form
   2,391.50/3,587.76 = 725.48/x
3. Step 3: Cross multiply
   2,391.50x = 3,587.76 × 725.48
4. Step 4: Simplify right side
   2,391.50x = 2,602,863.82
5. Step 5: Solve for x
   x = 2,602,863.82/2,391.50
6. Step 6: Final answer
   x = 1,088.38