Finding the Fourth Proportional to 1,392.01, 1,922.27 and 1,042.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.01 : 1,922.27 = 1,042.09 : x
2. Step 2: Convert to fraction form
   1,392.01/1,922.27 = 1,042.09/x
3. Step 3: Cross multiply
   1,392.01x = 1,922.27 × 1,042.09
4. Step 4: Simplify right side
   1,392.01x = 2,003,173.13
5. Step 5: Solve for x
   x = 2,003,173.13/1,392.01
6. Step 6: Final answer
   x = 1,439.05