Finding the Fourth Proportional to 21,498.01, 29,667.36 and 12,066.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.01 : 29,667.36 = 12,066.57 : x
2. Step 2: Convert to fraction form
   21,498.01/29,667.36 = 12,066.57/x
3. Step 3: Cross multiply
   21,498.01x = 29,667.36 × 12,066.57
4. Step 4: Simplify right side
   21,498.01x = 357,983,321.40
5. Step 5: Solve for x
   x = 357,983,321.40/21,498.01
6. Step 6: Final answer
   x = 16,651.93