Finding the Fourth Proportional to 2,059.80, 2,842.52 and 1,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.80 : 2,842.52 = 1,128.28 : x
2. Step 2: Convert to fraction form
   2,059.80/2,842.52 = 1,128.28/x
3. Step 3: Cross multiply
   2,059.80x = 2,842.52 × 1,128.28
4. Step 4: Simplify right side
   2,059.80x = 3,207,158.47
5. Step 5: Solve for x
   x = 3,207,158.47/2,059.80
6. Step 6: Final answer
   x = 1,557.02