Finding the Fourth Proportional to 18,708.72, 28,067.69 and 5,561.09

Step by Step Solution

1. Step 1: Write the proportion equation
   18,708.72 : 28,067.69 = 5,561.09 : x
2. Step 2: Convert to fraction form
   18,708.72/28,067.69 = 5,561.09/x
3. Step 3: Cross multiply
   18,708.72x = 28,067.69 × 5,561.09
4. Step 4: Simplify right side
   18,708.72x = 156,086,782.04
5. Step 5: Solve for x
   x = 156,086,782.04/18,708.72
6. Step 6: Final answer
   x = 8,343.00