Finding the Fourth Proportional to 2,406.92, 3,612.20 and 1,109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.92 : 3,612.20 = 1,109.30 : x
2. Step 2: Convert to fraction form
   2,406.92/3,612.20 = 1,109.30/x
3. Step 3: Cross multiply
   2,406.92x = 3,612.20 × 1,109.30
4. Step 4: Simplify right side
   2,406.92x = 4,006,989.85
5. Step 5: Solve for x
   x = 4,006,989.85/2,406.92
6. Step 6: Final answer
   x = 1,664.78