Finding the Fourth Proportional to 1,392.94, 1,922.12 and 803.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.94 : 1,922.12 = 803.34 : x
2. Step 2: Convert to fraction form
   1,392.94/1,922.12 = 803.34/x
3. Step 3: Cross multiply
   1,392.94x = 1,922.12 × 803.34
4. Step 4: Simplify right side
   1,392.94x = 1,544,115.88
5. Step 5: Solve for x
   x = 1,544,115.88/1,392.94
6. Step 6: Final answer
   x = 1,108.53