Finding the Fourth Proportional to 1,049.91, 1,575.78 and 725.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.91 : 1,575.78 = 725.51 : x
2. Step 2: Convert to fraction form
   1,049.91/1,575.78 = 725.51/x
3. Step 3: Cross multiply
   1,049.91x = 1,575.78 × 725.51
4. Step 4: Simplify right side
   1,049.91x = 1,143,236.27
5. Step 5: Solve for x
   x = 1,143,236.27/1,049.91
6. Step 6: Final answer
   x = 1,088.89