Finding the Fourth Proportional to 2,388.81, 3,296.31 and 1,393.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.81 : 3,296.31 = 1,393.89 : x
2. Step 2: Convert to fraction form
   2,388.81/3,296.31 = 1,393.89/x
3. Step 3: Cross multiply
   2,388.81x = 3,296.31 × 1,393.89
4. Step 4: Simplify right side
   2,388.81x = 4,594,693.55
5. Step 5: Solve for x
   x = 4,594,693.55/2,388.81
6. Step 6: Final answer
   x = 1,923.42