Finding the Fourth Proportional to 2,508.92, 3,462.30 and 1,389.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.92 : 3,462.30 = 1,389.86 : x
2. Step 2: Convert to fraction form
   2,508.92/3,462.30 = 1,389.86/x
3. Step 3: Cross multiply
   2,508.92x = 3,462.30 × 1,389.86
4. Step 4: Simplify right side
   2,508.92x = 4,812,100.18
5. Step 5: Solve for x
   x = 4,812,100.18/2,508.92
6. Step 6: Final answer
   x = 1,918.00