Finding the Fourth Proportional to 2,406.60, 3,608.76 and 1,108.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.60 : 3,608.76 = 1,108.20 : x
2. Step 2: Convert to fraction form
   2,406.60/3,608.76 = 1,108.20/x
3. Step 3: Cross multiply
   2,406.60x = 3,608.76 × 1,108.20
4. Step 4: Simplify right side
   2,406.60x = 3,999,227.83
5. Step 5: Solve for x
   x = 3,999,227.83/2,406.60
6. Step 6: Final answer
   x = 1,661.78