Finding the Fourth Proportional to 2,384.10, 3,290.10 and 1,389.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.10 : 3,290.10 = 1,389.46 : x
2. Step 2: Convert to fraction form
   2,384.10/3,290.10 = 1,389.46/x
3. Step 3: Cross multiply
   2,384.10x = 3,290.10 × 1,389.46
4. Step 4: Simplify right side
   2,384.10x = 4,571,462.35
5. Step 5: Solve for x
   x = 4,571,462.35/2,384.10
6. Step 6: Final answer
   x = 1,917.48