Finding the Fourth Proportional to 12,216.08, 18,322.00 and 5,641.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.08 : 18,322.00 = 5,641.72 : x
2. Step 2: Convert to fraction form
   12,216.08/18,322.00 = 5,641.72/x
3. Step 3: Cross multiply
   12,216.08x = 18,322.00 × 5,641.72
4. Step 4: Simplify right side
   12,216.08x = 103,367,533.93
5. Step 5: Solve for x
   x = 103,367,533.93/12,216.08
6. Step 6: Final answer
   x = 8,461.59