Finding the Fourth Proportional to 12,016.22, 18,012.98 and 5,435.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.22 : 18,012.98 = 5,435.78 : x
2. Step 2: Convert to fraction form
   12,016.22/18,012.98 = 5,435.78/x
3. Step 3: Cross multiply
   12,016.22x = 18,012.98 × 5,435.78
4. Step 4: Simplify right side
   12,016.22x = 97,914,519.95
5. Step 5: Solve for x
   x = 97,914,519.95/12,016.22
6. Step 6: Final answer
   x = 8,148.53