Finding the Fourth Proportional to 1,393.03, 1,922.40 and 803.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.03 : 1,922.40 = 803.69 : x
2. Step 2: Convert to fraction form
   1,393.03/1,922.40 = 803.69/x
3. Step 3: Cross multiply
   1,393.03x = 1,922.40 × 803.69
4. Step 4: Simplify right side
   1,393.03x = 1,545,011.25
5. Step 5: Solve for x
   x = 1,545,011.25/1,393.03
6. Step 6: Final answer
   x = 1,109.10