Finding the Fourth Proportional to 1,423.89, 1,965.06 and 834.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.89 : 1,965.06 = 834.21 : x
2. Step 2: Convert to fraction form
   1,423.89/1,965.06 = 834.21/x
3. Step 3: Cross multiply
   1,423.89x = 1,965.06 × 834.21
4. Step 4: Simplify right side
   1,423.89x = 1,639,272.70
5. Step 5: Solve for x
   x = 1,639,272.70/1,423.89
6. Step 6: Final answer
   x = 1,151.26