Finding the Fourth Proportional to 2,508.39, 3,461.76 and 1,389.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.39 : 3,461.76 = 1,389.69 : x
2. Step 2: Convert to fraction form
   2,508.39/3,461.76 = 1,389.69/x
3. Step 3: Cross multiply
   2,508.39x = 3,461.76 × 1,389.69
4. Step 4: Simplify right side
   2,508.39x = 4,810,773.25
5. Step 5: Solve for x
   x = 4,810,773.25/2,508.39
6. Step 6: Final answer
   x = 1,917.87