Finding the Fourth Proportional to 1,393.03, 1,922.31 and 803.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.03 : 1,922.31 = 803.53 : x
2. Step 2: Convert to fraction form
   1,393.03/1,922.31 = 803.53/x
3. Step 3: Cross multiply
   1,393.03x = 1,922.31 × 803.53
4. Step 4: Simplify right side
   1,393.03x = 1,544,633.75
5. Step 5: Solve for x
   x = 1,544,633.75/1,393.03
6. Step 6: Final answer
   x = 1,108.83