Finding the Fourth Proportional to 1,393.67, 1,922.71 and 834.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.67 : 1,922.71 = 834.16 : x
2. Step 2: Convert to fraction form
   1,393.67/1,922.71 = 834.16/x
3. Step 3: Cross multiply
   1,393.67x = 1,922.71 × 834.16
4. Step 4: Simplify right side
   1,393.67x = 1,603,847.77
5. Step 5: Solve for x
   x = 1,603,847.77/1,393.67
6. Step 6: Final answer
   x = 1,150.81