Finding the Fourth Proportional to 21,499.64, 29,667.87 and 12,066.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499.64 : 29,667.87 = 12,066.38 : x
2. Step 2: Convert to fraction form
   21,499.64/29,667.87 = 12,066.38/x
3. Step 3: Cross multiply
   21,499.64x = 29,667.87 × 12,066.38
4. Step 4: Simplify right side
   21,499.64x = 357,983,644.87
5. Step 5: Solve for x
   x = 357,983,644.87/21,499.64
6. Step 6: Final answer
   x = 16,650.68