Finding the Fourth Proportional to 12,066.32, 18,133.56 and 7,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,066.32 : 18,133.56 = 7,136.72 : x
2. Step 2: Convert to fraction form
   12,066.32/18,133.56 = 7,136.72/x
3. Step 3: Cross multiply
   12,066.32x = 18,133.56 × 7,136.72
4. Step 4: Simplify right side
   12,066.32x = 129,414,140.32
5. Step 5: Solve for x
   x = 129,414,140.32/12,066.32
6. Step 6: Final answer
   x = 10,725.24