Finding the Fourth Proportional to 2,151.37, 2,962.20 and 1,621

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.37 : 2,962.20 = 1,621 : x
2. Step 2: Convert to fraction form
   2,151.37/2,962.20 = 1,621/x
3. Step 3: Cross multiply
   2,151.37x = 2,962.20 × 1,621
4. Step 4: Simplify right side
   2,151.37x = 4,801,726.20
5. Step 5: Solve for x
   x = 4,801,726.20/2,151.37
6. Step 6: Final answer
   x = 2,231.94