Finding the Fourth Proportional to 2,387.92, 3,294.42 and 1,392.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.92 : 3,294.42 = 1,392.82 : x
2. Step 2: Convert to fraction form
   2,387.92/3,294.42 = 1,392.82/x
3. Step 3: Cross multiply
   2,387.92x = 3,294.42 × 1,392.82
4. Step 4: Simplify right side
   2,387.92x = 4,588,534.06
5. Step 5: Solve for x
   x = 4,588,534.06/2,387.92
6. Step 6: Final answer
   x = 1,921.56