Finding the Fourth Proportional to 18,066.81, 27,091.71 and 6,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,066.81 : 27,091.71 = 6,978.72 : x
2. Step 2: Convert to fraction form
   18,066.81/27,091.71 = 6,978.72/x
3. Step 3: Cross multiply
   18,066.81x = 27,091.71 × 6,978.72
4. Step 4: Simplify right side
   18,066.81x = 189,065,458.41
5. Step 5: Solve for x
   x = 189,065,458.41/18,066.81
6. Step 6: Final answer
   x = 10,464.79