Finding the Fourth Proportional to 16,139.81, 22,274.84 and 9,066.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,139.81 : 22,274.84 = 9,066.20 : x
2. Step 2: Convert to fraction form
   16,139.81/22,274.84 = 9,066.20/x
3. Step 3: Cross multiply
   16,139.81x = 22,274.84 × 9,066.20
4. Step 4: Simplify right side
   16,139.81x = 201,948,154.41
5. Step 5: Solve for x
   x = 201,948,154.41/16,139.81
6. Step 6: Final answer
   x = 12,512.42