Finding the Fourth Proportional to 1,086.37, 1,628.15 and 696.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.37 : 1,628.15 = 696.22 : x
2. Step 2: Convert to fraction form
   1,086.37/1,628.15 = 696.22/x
3. Step 3: Cross multiply
   1,086.37x = 1,628.15 × 696.22
4. Step 4: Simplify right side
   1,086.37x = 1,133,550.59
5. Step 5: Solve for x
   x = 1,133,550.59/1,086.37
6. Step 6: Final answer
   x = 1,043.43