Finding the Fourth Proportional to 2,073.05, 2,860.86 and 1,128.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.05 : 2,860.86 = 1,128.90 : x
2. Step 2: Convert to fraction form
   2,073.05/2,860.86 = 1,128.90/x
3. Step 3: Cross multiply
   2,073.05x = 2,860.86 × 1,128.90
4. Step 4: Simplify right side
   2,073.05x = 3,229,614.09
5. Step 5: Solve for x
   x = 3,229,614.09/2,073.05
6. Step 6: Final answer
   x = 1,557.90