Finding the Fourth Proportional to 1,392.59, 1,922.01 and 803.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.59 : 1,922.01 = 803.46 : x
2. Step 2: Convert to fraction form
   1,392.59/1,922.01 = 803.46/x
3. Step 3: Cross multiply
   1,392.59x = 1,922.01 × 803.46
4. Step 4: Simplify right side
   1,392.59x = 1,544,258.15
5. Step 5: Solve for x
   x = 1,544,258.15/1,392.59
6. Step 6: Final answer
   x = 1,108.91