Finding the Fourth Proportional to 2,007.81, 3,011.49 and 1,275.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.81 : 3,011.49 = 1,275.15 : x
2. Step 2: Convert to fraction form
   2,007.81/3,011.49 = 1,275.15/x
3. Step 3: Cross multiply
   2,007.81x = 3,011.49 × 1,275.15
4. Step 4: Simplify right side
   2,007.81x = 3,840,101.47
5. Step 5: Solve for x
   x = 3,840,101.47/2,007.81
6. Step 6: Final answer
   x = 1,912.58