Finding the Fourth Proportional to 1,423.98, 1,964.76 and 834.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.98 : 1,964.76 = 834.38 : x
2. Step 2: Convert to fraction form
   1,423.98/1,964.76 = 834.38/x
3. Step 3: Cross multiply
   1,423.98x = 1,964.76 × 834.38
4. Step 4: Simplify right side
   1,423.98x = 1,639,356.45
5. Step 5: Solve for x
   x = 1,639,356.45/1,423.98
6. Step 6: Final answer
   x = 1,151.25