Finding the Fourth Proportional to 3,456.66, 5,186.82 and 2,072.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.66 : 5,186.82 = 2,072.78 : x
2. Step 2: Convert to fraction form
   3,456.66/5,186.82 = 2,072.78/x
3. Step 3: Cross multiply
   3,456.66x = 5,186.82 × 2,072.78
4. Step 4: Simplify right side
   3,456.66x = 10,751,136.76
5. Step 5: Solve for x
   x = 10,751,136.76/3,456.66
6. Step 6: Final answer
   x = 3,110.27