Finding the Fourth Proportional to 2,151.34, 3,227.99 and 1,275.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.34 : 3,227.99 = 1,275.57 : x
2. Step 2: Convert to fraction form
   2,151.34/3,227.99 = 1,275.57/x
3. Step 3: Cross multiply
   2,151.34x = 3,227.99 × 1,275.57
4. Step 4: Simplify right side
   2,151.34x = 4,117,527.20
5. Step 5: Solve for x
   x = 4,117,527.20/2,151.34
6. Step 6: Final answer
   x = 1,913.94