Finding the Fourth Proportional to 1,393.80, 1,922.88 and 834.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.80 : 1,922.88 = 834.29 : x
2. Step 2: Convert to fraction form
   1,393.80/1,922.88 = 834.29/x
3. Step 3: Cross multiply
   1,393.80x = 1,922.88 × 834.29
4. Step 4: Simplify right side
   1,393.80x = 1,604,239.56
5. Step 5: Solve for x
   x = 1,604,239.56/1,393.80
6. Step 6: Final answer
   x = 1,150.98