Finding the Fourth Proportional to 16,066.88, 22,171.43 and 8,991.94

Step by Step Solution

1. Step 1: Write the proportion equation
   16,066.88 : 22,171.43 = 8,991.94 : x
2. Step 2: Convert to fraction form
   16,066.88/22,171.43 = 8,991.94/x
3. Step 3: Cross multiply
   16,066.88x = 22,171.43 × 8,991.94
4. Step 4: Simplify right side
   16,066.88x = 199,364,012.46
5. Step 5: Solve for x
   x = 199,364,012.46/16,066.88
6. Step 6: Final answer
   x = 12,408.38