Finding the Fourth Proportional to 2,860.02, 4,291.78 and 1,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,860.02 : 4,291.78 = 1,128.50 : x
2. Step 2: Convert to fraction form
   2,860.02/4,291.78 = 1,128.50/x
3. Step 3: Cross multiply
   2,860.02x = 4,291.78 × 1,128.50
4. Step 4: Simplify right side
   2,860.02x = 4,843,273.73
5. Step 5: Solve for x
   x = 4,843,273.73/2,860.02
6. Step 6: Final answer
   x = 1,693.44