Finding the Fourth Proportional to 2,073.10, 2,860.79 and 1,128.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.10 : 2,860.79 = 1,128.87 : x
2. Step 2: Convert to fraction form
   2,073.10/2,860.79 = 1,128.87/x
3. Step 3: Cross multiply
   2,073.10x = 2,860.79 × 1,128.87
4. Step 4: Simplify right side
   2,073.10x = 3,229,447.21
5. Step 5: Solve for x
   x = 3,229,447.21/2,073.10
6. Step 6: Final answer
   x = 1,557.79