Finding the Fourth Proportional to 1,088.69, 1,631.67 and 718.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.69 : 1,631.67 = 718.27 : x
2. Step 2: Convert to fraction form
   1,088.69/1,631.67 = 718.27/x
3. Step 3: Cross multiply
   1,088.69x = 1,631.67 × 718.27
4. Step 4: Simplify right side
   1,088.69x = 1,171,979.61
5. Step 5: Solve for x
   x = 1,171,979.61/1,088.69
6. Step 6: Final answer
   x = 1,076.50