Finding the Fourth Proportional to 2,508.89, 3,462.12 and 1,389.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.89 : 3,462.12 = 1,389.77 : x
2. Step 2: Convert to fraction form
   2,508.89/3,462.12 = 1,389.77/x
3. Step 3: Cross multiply
   2,508.89x = 3,462.12 × 1,389.77
4. Step 4: Simplify right side
   2,508.89x = 4,811,533.20
5. Step 5: Solve for x
   x = 4,811,533.20/2,508.89
6. Step 6: Final answer
   x = 1,917.80