Finding the Fourth Proportional to 1,423.74, 1,964.31 and 802.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.74 : 1,964.31 = 802.62 : x
2. Step 2: Convert to fraction form
   1,423.74/1,964.31 = 802.62/x
3. Step 3: Cross multiply
   1,423.74x = 1,964.31 × 802.62
4. Step 4: Simplify right side
   1,423.74x = 1,576,594.49
5. Step 5: Solve for x
   x = 1,576,594.49/1,423.74
6. Step 6: Final answer
   x = 1,107.36