Finding the Fourth Proportional to 2,526.28, 3,789.34 and 1,139.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,526.28 : 3,789.34 = 1,139.29 : x
2. Step 2: Convert to fraction form
   2,526.28/3,789.34 = 1,139.29/x
3. Step 3: Cross multiply
   2,526.28x = 3,789.34 × 1,139.29
4. Step 4: Simplify right side
   2,526.28x = 4,317,157.17
5. Step 5: Solve for x
   x = 4,317,157.17/2,526.28
6. Step 6: Final answer
   x = 1,708.90