Finding the Fourth Proportional to 2,388.19, 3,294.42 and 1,393.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.19 : 3,294.42 = 1,393.10 : x
2. Step 2: Convert to fraction form
   2,388.19/3,294.42 = 1,393.10/x
3. Step 3: Cross multiply
   2,388.19x = 3,294.42 × 1,393.10
4. Step 4: Simplify right side
   2,388.19x = 4,589,456.50
5. Step 5: Solve for x
   x = 4,589,456.50/2,388.19
6. Step 6: Final answer
   x = 1,921.73