Finding the Fourth Proportional to 2,508.87, 3,462.41 and 1,389.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.87 : 3,462.41 = 1,389.86 : x
2. Step 2: Convert to fraction form
   2,508.87/3,462.41 = 1,389.86/x
3. Step 3: Cross multiply
   2,508.87x = 3,462.41 × 1,389.86
4. Step 4: Simplify right side
   2,508.87x = 4,812,264.31
5. Step 5: Solve for x
   x = 4,812,264.31/2,508.87
6. Step 6: Final answer
   x = 1,918.10