Finding the Fourth Proportional to 2,023.60, 2,792.73 and 1,139.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.60 : 2,792.73 = 1,139.35 : x
2. Step 2: Convert to fraction form
   2,023.60/2,792.73 = 1,139.35/x
3. Step 3: Cross multiply
   2,023.60x = 2,792.73 × 1,139.35
4. Step 4: Simplify right side
   2,023.60x = 3,181,896.93
5. Step 5: Solve for x
   x = 3,181,896.93/2,023.60
6. Step 6: Final answer
   x = 1,572.39