Finding the Fourth Proportional to 2,508.59, 3,461.88 and 1,389.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.59 : 3,461.88 = 1,389.54 : x
2. Step 2: Convert to fraction form
   2,508.59/3,461.88 = 1,389.54/x
3. Step 3: Cross multiply
   2,508.59x = 3,461.88 × 1,389.54
4. Step 4: Simplify right side
   2,508.59x = 4,810,425.92
5. Step 5: Solve for x
   x = 4,810,425.92/2,508.59
6. Step 6: Final answer
   x = 1,917.59