Finding the Fourth Proportional to 2,384.49, 3,290.59 and 1,389.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.49 : 3,290.59 = 1,389.92 : x
2. Step 2: Convert to fraction form
   2,384.49/3,290.59 = 1,389.92/x
3. Step 3: Cross multiply
   2,384.49x = 3,290.59 × 1,389.92
4. Step 4: Simplify right side
   2,384.49x = 4,573,656.85
5. Step 5: Solve for x
   x = 4,573,656.85/2,384.49
6. Step 6: Final answer
   x = 1,918.09