Finding the Fourth Proportional to 21,899.55, 30,221.41 and 12,468.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,899.55 : 30,221.41 = 12,468.12 : x
2. Step 2: Convert to fraction form
   21,899.55/30,221.41 = 12,468.12/x
3. Step 3: Cross multiply
   21,899.55x = 30,221.41 × 12,468.12
4. Step 4: Simplify right side
   21,899.55x = 376,804,046.51
5. Step 5: Solve for x
   x = 376,804,046.51/21,899.55
6. Step 6: Final answer
   x = 17,206.02