Finding the Fourth Proportional to 1,392.26, 1,921.50 and 802.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.26 : 1,921.50 = 802.99 : x
2. Step 2: Convert to fraction form
   1,392.26/1,921.50 = 802.99/x
3. Step 3: Cross multiply
   1,392.26x = 1,921.50 × 802.99
4. Step 4: Simplify right side
   1,392.26x = 1,542,945.29
5. Step 5: Solve for x
   x = 1,542,945.29/1,392.26
6. Step 6: Final answer
   x = 1,108.23