Finding the Fourth Proportional to 1,393.10, 1,922.24 and 803.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.10 : 1,922.24 = 803.52 : x
2. Step 2: Convert to fraction form
   1,393.10/1,922.24 = 803.52/x
3. Step 3: Cross multiply
   1,393.10x = 1,922.24 × 803.52
4. Step 4: Simplify right side
   1,393.10x = 1,544,558.28
5. Step 5: Solve for x
   x = 1,544,558.28/1,393.10
6. Step 6: Final answer
   x = 1,108.72