Finding the Fourth Proportional to 1,447.33, 2,170.61 and 716.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.33 : 2,170.61 = 716.71 : x
2. Step 2: Convert to fraction form
   1,447.33/2,170.61 = 716.71/x
3. Step 3: Cross multiply
   1,447.33x = 2,170.61 × 716.71
4. Step 4: Simplify right side
   1,447.33x = 1,555,697.89
5. Step 5: Solve for x
   x = 1,555,697.89/1,447.33
6. Step 6: Final answer
   x = 1,074.87