Finding the Fourth Proportional to 1,086.69, 1,628.67 and 716.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.69 : 1,628.67 = 716.27 : x
2. Step 2: Convert to fraction form
   1,086.69/1,628.67 = 716.27/x
3. Step 3: Cross multiply
   1,086.69x = 1,628.67 × 716.27
4. Step 4: Simplify right side
   1,086.69x = 1,166,567.46
5. Step 5: Solve for x
   x = 1,166,567.46/1,086.69
6. Step 6: Final answer
   x = 1,073.51