Finding the Fourth Proportional to 2,720.43, 4,077.45 and 1,256.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,720.43 : 4,077.45 = 1,256.49 : x
2. Step 2: Convert to fraction form
   2,720.43/4,077.45 = 1,256.49/x
3. Step 3: Cross multiply
   2,720.43x = 4,077.45 × 1,256.49
4. Step 4: Simplify right side
   2,720.43x = 5,123,275.15
5. Step 5: Solve for x
   x = 5,123,275.15/2,720.43
6. Step 6: Final answer
   x = 1,883.26