Finding the Fourth Proportional to 2,508.29, 3,461.46 and 1,389.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.29 : 3,461.46 = 1,389.30 : x
2. Step 2: Convert to fraction form
   2,508.29/3,461.46 = 1,389.30/x
3. Step 3: Cross multiply
   2,508.29x = 3,461.46 × 1,389.30
4. Step 4: Simplify right side
   2,508.29x = 4,809,011.57
5. Step 5: Solve for x
   x = 4,809,011.57/2,508.29
6. Step 6: Final answer
   x = 1,917.25