Finding the Fourth Proportional to 2,508.05, 3,460.84 and 1,388.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.05 : 3,460.84 = 1,388.81 : x
2. Step 2: Convert to fraction form
   2,508.05/3,460.84 = 1,388.81/x
3. Step 3: Cross multiply
   2,508.05x = 3,460.84 × 1,388.81
4. Step 4: Simplify right side
   2,508.05x = 4,806,449.20
5. Step 5: Solve for x
   x = 4,806,449.20/2,508.05
6. Step 6: Final answer
   x = 1,916.41