Finding the Fourth Proportional to 10,161.78, 15,243.42 and 2,766.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,161.78 : 15,243.42 = 2,766.81 : x
2. Step 2: Convert to fraction form
   10,161.78/15,243.42 = 2,766.81/x
3. Step 3: Cross multiply
   10,161.78x = 15,243.42 × 2,766.81
4. Step 4: Simplify right side
   10,161.78x = 42,175,646.89
5. Step 5: Solve for x
   x = 42,175,646.89/10,161.78
6. Step 6: Final answer
   x = 4,150.42