Finding the Fourth Proportional to 2,007.28, 3,008.86 and 1,139.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.28 : 3,008.86 = 1,139.76 : x
2. Step 2: Convert to fraction form
   2,007.28/3,008.86 = 1,139.76/x
3. Step 3: Cross multiply
   2,007.28x = 3,008.86 × 1,139.76
4. Step 4: Simplify right side
   2,007.28x = 3,429,378.27
5. Step 5: Solve for x
   x = 3,429,378.27/2,007.28
6. Step 6: Final answer
   x = 1,708.47