Finding the Fourth Proportional to 1,393.38, 1,922.96 and 803.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.38 : 1,922.96 = 803.96 : x
2. Step 2: Convert to fraction form
   1,393.38/1,922.96 = 803.96/x
3. Step 3: Cross multiply
   1,393.38x = 1,922.96 × 803.96
4. Step 4: Simplify right side
   1,393.38x = 1,545,969.29
5. Step 5: Solve for x
   x = 1,545,969.29/1,393.38
6. Step 6: Final answer
   x = 1,109.51