Finding the Fourth Proportional to 2,421.86, 3,342.42 and 1,478.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421.86 : 3,342.42 = 1,478.21 : x
2. Step 2: Convert to fraction form
   2,421.86/3,342.42 = 1,478.21/x
3. Step 3: Cross multiply
   2,421.86x = 3,342.42 × 1,478.21
4. Step 4: Simplify right side
   2,421.86x = 4,940,781.96
5. Step 5: Solve for x
   x = 4,940,781.96/2,421.86
6. Step 6: Final answer
   x = 2,040.08