Finding the Fourth Proportional to 2,508.56, 3,461.76 and 1,389.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.56 : 3,461.76 = 1,389.46 : x
2. Step 2: Convert to fraction form
   2,508.56/3,461.76 = 1,389.46/x
3. Step 3: Cross multiply
   2,508.56x = 3,461.76 × 1,389.46
4. Step 4: Simplify right side
   2,508.56x = 4,809,977.05
5. Step 5: Solve for x
   x = 4,809,977.05/2,508.56
6. Step 6: Final answer
   x = 1,917.43