Finding the Fourth Proportional to 12,216.63, 18,327.42 and 5,196.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.63 : 18,327.42 = 5,196.63 : x
2. Step 2: Convert to fraction form
   12,216.63/18,327.42 = 5,196.63/x
3. Step 3: Cross multiply
   12,216.63x = 18,327.42 × 5,196.63
4. Step 4: Simplify right side
   12,216.63x = 95,240,820.59
5. Step 5: Solve for x
   x = 95,240,820.59/12,216.63
6. Step 6: Final answer
   x = 7,796.00