Finding the Fourth Proportional to 3,427.78, 5,111.56 and 3,396.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,427.78 : 5,111.56 = 3,396.60 : x
2. Step 2: Convert to fraction form
   3,427.78/5,111.56 = 3,396.60/x
3. Step 3: Cross multiply
   3,427.78x = 5,111.56 × 3,396.60
4. Step 4: Simplify right side
   3,427.78x = 17,361,924.70
5. Step 5: Solve for x
   x = 17,361,924.70/3,427.78
6. Step 6: Final answer
   x = 5,065.06