Finding the Fourth Proportional to 2,526.60, 3,789.74 and 1,139.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,526.60 : 3,789.74 = 1,139.37 : x
2. Step 2: Convert to fraction form
   2,526.60/3,789.74 = 1,139.37/x
3. Step 3: Cross multiply
   2,526.60x = 3,789.74 × 1,139.37
4. Step 4: Simplify right side
   2,526.60x = 4,317,891.42
5. Step 5: Solve for x
   x = 4,317,891.42/2,526.60
6. Step 6: Final answer
   x = 1,708.98