Finding the Fourth Proportional to 1,393.91, 1,923.53 and 834.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.91 : 1,923.53 = 834.69 : x
2. Step 2: Convert to fraction form
   1,393.91/1,923.53 = 834.69/x
3. Step 3: Cross multiply
   1,393.91x = 1,923.53 × 834.69
4. Step 4: Simplify right side
   1,393.91x = 1,605,537.46
5. Step 5: Solve for x
   x = 1,605,537.46/1,393.91
6. Step 6: Final answer
   x = 1,151.82