Finding the Fourth Proportional to 12,219.42, 18,327.91 and 5,645.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,219.42 : 18,327.91 = 5,645.51 : x
2. Step 2: Convert to fraction form
   12,219.42/18,327.91 = 5,645.51/x
3. Step 3: Cross multiply
   12,219.42x = 18,327.91 × 5,645.51
4. Step 4: Simplify right side
   12,219.42x = 103,470,293.43
5. Step 5: Solve for x
   x = 103,470,293.43/12,219.42
6. Step 6: Final answer
   x = 8,467.69