Finding the Fourth Proportional to 1,423.88, 1,964.98 and 834.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.88 : 1,964.98 = 834.84 : x
2. Step 2: Convert to fraction form
   1,423.88/1,964.98 = 834.84/x
3. Step 3: Cross multiply
   1,423.88x = 1,964.98 × 834.84
4. Step 4: Simplify right side
   1,423.88x = 1,640,443.90
5. Step 5: Solve for x
   x = 1,640,443.90/1,423.88
6. Step 6: Final answer
   x = 1,152.09