Finding the Fourth Proportional to 1,393.55, 1,923.19 and 834.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.55 : 1,923.19 = 834.05 : x
2. Step 2: Convert to fraction form
   1,393.55/1,923.19 = 834.05/x
3. Step 3: Cross multiply
   1,393.55x = 1,923.19 × 834.05
4. Step 4: Simplify right side
   1,393.55x = 1,604,033.22
5. Step 5: Solve for x
   x = 1,604,033.22/1,393.55
6. Step 6: Final answer
   x = 1,151.04