Finding the Fourth Proportional to 1,391.82, 1,920.15 and 832.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.82 : 1,920.15 = 832.08 : x
2. Step 2: Convert to fraction form
   1,391.82/1,920.15 = 832.08/x
3. Step 3: Cross multiply
   1,391.82x = 1,920.15 × 832.08
4. Step 4: Simplify right side
   1,391.82x = 1,597,718.41
5. Step 5: Solve for x
   x = 1,597,718.41/1,391.82
6. Step 6: Final answer
   x = 1,147.93