Finding the Fourth Proportional to 12,219.31, 18,327.57 and 5,643.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,219.31 : 18,327.57 = 5,643.73 : x
2. Step 2: Convert to fraction form
   12,219.31/18,327.57 = 5,643.73/x
3. Step 3: Cross multiply
   12,219.31x = 18,327.57 × 5,643.73
4. Step 4: Simplify right side
   12,219.31x = 103,435,856.64
5. Step 5: Solve for x
   x = 103,435,856.64/12,219.31
6. Step 6: Final answer
   x = 8,464.95