Finding the Fourth Proportional to 21,498.21, 29,667.51 and 12,066.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.21 : 29,667.51 = 12,066.75 : x
2. Step 2: Convert to fraction form
   21,498.21/29,667.51 = 12,066.75/x
3. Step 3: Cross multiply
   21,498.21x = 29,667.51 × 12,066.75
4. Step 4: Simplify right side
   21,498.21x = 357,990,426.29
5. Step 5: Solve for x
   x = 357,990,426.29/21,498.21
6. Step 6: Final answer
   x = 16,652.10