Finding the Fourth Proportional to 2,384.27, 3,290.48 and 1,389.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.27 : 3,290.48 = 1,389.33 : x
2. Step 2: Convert to fraction form
   2,384.27/3,290.48 = 1,389.33/x
3. Step 3: Cross multiply
   2,384.27x = 3,290.48 × 1,389.33
4. Step 4: Simplify right side
   2,384.27x = 4,571,555.63
5. Step 5: Solve for x
   x = 4,571,555.63/2,384.27
6. Step 6: Final answer
   x = 1,917.39