Finding the Fourth Proportional to 1,189.43, 1,641.37 and 658.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189.43 : 1,641.37 = 658.33 : x
2. Step 2: Convert to fraction form
   1,189.43/1,641.37 = 658.33/x
3. Step 3: Cross multiply
   1,189.43x = 1,641.37 × 658.33
4. Step 4: Simplify right side
   1,189.43x = 1,080,563.83
5. Step 5: Solve for x
   x = 1,080,563.83/1,189.43
6. Step 6: Final answer
   x = 908.48