Finding the Fourth Proportional to 2,508.86, 3,462.28 and 1,389.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.86 : 3,462.28 = 1,389.89 : x
2. Step 2: Convert to fraction form
   2,508.86/3,462.28 = 1,389.89/x
3. Step 3: Cross multiply
   2,508.86x = 3,462.28 × 1,389.89
4. Step 4: Simplify right side
   2,508.86x = 4,812,171.04
5. Step 5: Solve for x
   x = 4,812,171.04/2,508.86
6. Step 6: Final answer
   x = 1,918.07