Finding the Fourth Proportional to 1,391.34, 1,920.02 and 832.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.34 : 1,920.02 = 832.22 : x
2. Step 2: Convert to fraction form
   1,391.34/1,920.02 = 832.22/x
3. Step 3: Cross multiply
   1,391.34x = 1,920.02 × 832.22
4. Step 4: Simplify right side
   1,391.34x = 1,597,879.04
5. Step 5: Solve for x
   x = 1,597,879.04/1,391.34
6. Step 6: Final answer
   x = 1,148.45