Finding the Fourth Proportional to 2,023.76, 2,792.14 and 1,139.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,023.76 : 2,792.14 = 1,139.39 : x
2. Step 2: Convert to fraction form
   2,023.76/2,792.14 = 1,139.39/x
3. Step 3: Cross multiply
   2,023.76x = 2,792.14 × 1,139.39
4. Step 4: Simplify right side
   2,023.76x = 3,181,334.33
5. Step 5: Solve for x
   x = 3,181,334.33/2,023.76
6. Step 6: Final answer
   x = 1,571.99