Finding the Fourth Proportional to 1,391.69, 1,920.38 and 832.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.69 : 1,920.38 = 832.08 : x
2. Step 2: Convert to fraction form
   1,391.69/1,920.38 = 832.08/x
3. Step 3: Cross multiply
   1,391.69x = 1,920.38 × 832.08
4. Step 4: Simplify right side
   1,391.69x = 1,597,905.63
5. Step 5: Solve for x
   x = 1,597,905.63/1,391.69
6. Step 6: Final answer
   x = 1,148.18