Finding the Fourth Proportional to 2,406.58, 3,320.90 and 1,621.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.58 : 3,320.90 = 1,621.69 : x
2. Step 2: Convert to fraction form
   2,406.58/3,320.90 = 1,621.69/x
3. Step 3: Cross multiply
   2,406.58x = 3,320.90 × 1,621.69
4. Step 4: Simplify right side
   2,406.58x = 5,385,459.99
5. Step 5: Solve for x
   x = 5,385,459.99/2,406.58
6. Step 6: Final answer
   x = 2,237.81