Finding the Fourth Proportional to 1,423.08, 1,963.94 and 802.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.08 : 1,963.94 = 802.12 : x
2. Step 2: Convert to fraction form
   1,423.08/1,963.94 = 802.12/x
3. Step 3: Cross multiply
   1,423.08x = 1,963.94 × 802.12
4. Step 4: Simplify right side
   1,423.08x = 1,575,315.55
5. Step 5: Solve for x
   x = 1,575,315.55/1,423.08
6. Step 6: Final answer
   x = 1,106.98