Finding the Fourth Proportional to 2,409.23, 3,319.56 and 1,621.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,409.23 : 3,319.56 = 1,621.91 : x
2. Step 2: Convert to fraction form
   2,409.23/3,319.56 = 1,621.91/x
3. Step 3: Cross multiply
   2,409.23x = 3,319.56 × 1,621.91
4. Step 4: Simplify right side
   2,409.23x = 5,384,027.56
5. Step 5: Solve for x
   x = 5,384,027.56/2,409.23
6. Step 6: Final answer
   x = 2,234.75