Finding the Fourth Proportional to 2,406.78, 3,606.93 and 1,105.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.78 : 3,606.93 = 1,105.38 : x
2. Step 2: Convert to fraction form
   2,406.78/3,606.93 = 1,105.38/x
3. Step 3: Cross multiply
   2,406.78x = 3,606.93 × 1,105.38
4. Step 4: Simplify right side
   2,406.78x = 3,987,028.28
5. Step 5: Solve for x
   x = 3,987,028.28/2,406.78
6. Step 6: Final answer
   x = 1,656.58