Finding the Fourth Proportional to 1,423.76, 1,964.79 and 834.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.76 : 1,964.79 = 834.30 : x
2. Step 2: Convert to fraction form
   1,423.76/1,964.79 = 834.30/x
3. Step 3: Cross multiply
   1,423.76x = 1,964.79 × 834.30
4. Step 4: Simplify right side
   1,423.76x = 1,639,224.30
5. Step 5: Solve for x
   x = 1,639,224.30/1,423.76
6. Step 6: Final answer
   x = 1,151.34