Finding the Fourth Proportional to 1,393.02, 1,922.28 and 803.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.02 : 1,922.28 = 803.58 : x
2. Step 2: Convert to fraction form
   1,393.02/1,922.28 = 803.58/x
3. Step 3: Cross multiply
   1,393.02x = 1,922.28 × 803.58
4. Step 4: Simplify right side
   1,393.02x = 1,544,705.76
5. Step 5: Solve for x
   x = 1,544,705.76/1,393.02
6. Step 6: Final answer
   x = 1,108.89