Finding the Fourth Proportional to 2,467.92, 3,405.78 and 1,420.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,467.92 : 3,405.78 = 1,420.05 : x
2. Step 2: Convert to fraction form
   2,467.92/3,405.78 = 1,420.05/x
3. Step 3: Cross multiply
   2,467.92x = 3,405.78 × 1,420.05
4. Step 4: Simplify right side
   2,467.92x = 4,836,377.89
5. Step 5: Solve for x
   x = 4,836,377.89/2,467.92
6. Step 6: Final answer
   x = 1,959.70