Finding the Fourth Proportional to 1,088.82, 1,629.18 and 656.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.82 : 1,629.18 = 656.28 : x
2. Step 2: Convert to fraction form
   1,088.82/1,629.18 = 656.28/x
3. Step 3: Cross multiply
   1,088.82x = 1,629.18 × 656.28
4. Step 4: Simplify right side
   1,088.82x = 1,069,198.25
5. Step 5: Solve for x
   x = 1,069,198.25/1,088.82
6. Step 6: Final answer
   x = 981.98