Finding the Fourth Proportional to 2,712.28, 4,065.48 and 1,413.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,712.28 : 4,065.48 = 1,413.88 : x
2. Step 2: Convert to fraction form
   2,712.28/4,065.48 = 1,413.88/x
3. Step 3: Cross multiply
   2,712.28x = 4,065.48 × 1,413.88
4. Step 4: Simplify right side
   2,712.28x = 5,748,100.86
5. Step 5: Solve for x
   x = 5,748,100.86/2,712.28
6. Step 6: Final answer
   x = 2,119.29