Finding the Fourth Proportional to 1,760.29, 2,428.18 and 1,139.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.29 : 2,428.18 = 1,139.29 : x
2. Step 2: Convert to fraction form
   1,760.29/2,428.18 = 1,139.29/x
3. Step 3: Cross multiply
   1,760.29x = 2,428.18 × 1,139.29
4. Step 4: Simplify right side
   1,760.29x = 2,766,401.19
5. Step 5: Solve for x
   x = 2,766,401.19/1,760.29
6. Step 6: Final answer
   x = 1,571.56