Finding the Fourth Proportional to 3,427.22, 5,138.88 and 1,086.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,427.22 : 5,138.88 = 1,086.78 : x
2. Step 2: Convert to fraction form
   3,427.22/5,138.88 = 1,086.78/x
3. Step 3: Cross multiply
   3,427.22x = 5,138.88 × 1,086.78
4. Step 4: Simplify right side
   3,427.22x = 5,584,832.01
5. Step 5: Solve for x
   x = 5,584,832.01/3,427.22
6. Step 6: Final answer
   x = 1,629.55