Finding the Fourth Proportional to 2,059.60, 2,842.20 and 1,128.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.60 : 2,842.20 = 1,128.08 : x
2. Step 2: Convert to fraction form
   2,059.60/2,842.20 = 1,128.08/x
3. Step 3: Cross multiply
   2,059.60x = 2,842.20 × 1,128.08
4. Step 4: Simplify right side
   2,059.60x = 3,206,228.98
5. Step 5: Solve for x
   x = 3,206,228.98/2,059.60
6. Step 6: Final answer
   x = 1,556.72