Finding the Fourth Proportional to 2,137.88, 3,208 and 1,621.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,137.88 : 3,208 = 1,621.10 : x
2. Step 2: Convert to fraction form
   2,137.88/3,208 = 1,621.10/x
3. Step 3: Cross multiply
   2,137.88x = 3,208 × 1,621.10
4. Step 4: Simplify right side
   2,137.88x = 5,200,488.80
5. Step 5: Solve for x
   x = 5,200,488.80/2,137.88
6. Step 6: Final answer
   x = 2,432.54