Finding the Fourth Proportional to 2,421.12, 3,342.17 and 1,636.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421.12 : 3,342.17 = 1,636.23 : x
2. Step 2: Convert to fraction form
   2,421.12/3,342.17 = 1,636.23/x
3. Step 3: Cross multiply
   2,421.12x = 3,342.17 × 1,636.23
4. Step 4: Simplify right side
   2,421.12x = 5,468,550.64
5. Step 5: Solve for x
   x = 5,468,550.64/2,421.12
6. Step 6: Final answer
   x = 2,258.69