Finding the Fourth Proportional to 2,508.63, 3,461.85 and 1,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.63 : 3,461.85 = 1,389.50 : x
2. Step 2: Convert to fraction form
   2,508.63/3,461.85 = 1,389.50/x
3. Step 3: Cross multiply
   2,508.63x = 3,461.85 × 1,389.50
4. Step 4: Simplify right side
   2,508.63x = 4,810,240.58
5. Step 5: Solve for x
   x = 4,810,240.58/2,508.63
6. Step 6: Final answer
   x = 1,917.48