Finding the Fourth Proportional to 1,393.26, 1,922.92 and 803.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.26 : 1,922.92 = 803.99 : x
2. Step 2: Convert to fraction form
   1,393.26/1,922.92 = 803.99/x
3. Step 3: Cross multiply
   1,393.26x = 1,922.92 × 803.99
4. Step 4: Simplify right side
   1,393.26x = 1,546,008.45
5. Step 5: Solve for x
   x = 1,546,008.45/1,393.26
6. Step 6: Final answer
   x = 1,109.63