Finding the Fourth Proportional to 2,088.78, 2,882.61 and 1,157.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.78 : 2,882.61 = 1,157.28 : x
2. Step 2: Convert to fraction form
   2,088.78/2,882.61 = 1,157.28/x
3. Step 3: Cross multiply
   2,088.78x = 2,882.61 × 1,157.28
4. Step 4: Simplify right side
   2,088.78x = 3,335,986.90
5. Step 5: Solve for x
   x = 3,335,986.90/2,088.78
6. Step 6: Final answer
   x = 1,597.10