Finding the Fourth Proportional to 1,992.72, 2,986.88 and 1,447.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.72 : 2,986.88 = 1,447.28 : x
2. Step 2: Convert to fraction form
   1,992.72/2,986.88 = 1,447.28/x
3. Step 3: Cross multiply
   1,992.72x = 2,986.88 × 1,447.28
4. Step 4: Simplify right side
   1,992.72x = 4,322,851.69
5. Step 5: Solve for x
   x = 4,322,851.69/1,992.72
6. Step 6: Final answer
   x = 2,169.32