Finding the Fourth Proportional to 1,423.99, 1,964.65 and 802.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.99 : 1,964.65 = 802.87 : x
2. Step 2: Convert to fraction form
   1,423.99/1,964.65 = 802.87/x
3. Step 3: Cross multiply
   1,423.99x = 1,964.65 × 802.87
4. Step 4: Simplify right side
   1,423.99x = 1,577,358.55
5. Step 5: Solve for x
   x = 1,577,358.55/1,423.99
6. Step 6: Final answer
   x = 1,107.70