Finding the Fourth Proportional to 12,290.22, 18,436.56 and 3,968.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.22 : 18,436.56 = 3,968.28 : x
2. Step 2: Convert to fraction form
   12,290.22/18,436.56 = 3,968.28/x
3. Step 3: Cross multiply
   12,290.22x = 18,436.56 × 3,968.28
4. Step 4: Simplify right side
   12,290.22x = 73,161,432.32
5. Step 5: Solve for x
   x = 73,161,432.32/12,290.22
6. Step 6: Final answer
   x = 5,952.82