Finding the Fourth Proportional to 2,072.62, 2,860.22 and 1,128.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.62 : 2,860.22 = 1,128.42 : x
2. Step 2: Convert to fraction form
   2,072.62/2,860.22 = 1,128.42/x
3. Step 3: Cross multiply
   2,072.62x = 2,860.22 × 1,128.42
4. Step 4: Simplify right side
   2,072.62x = 3,227,535.87
5. Step 5: Solve for x
   x = 3,227,535.87/2,072.62
6. Step 6: Final answer
   x = 1,557.22