Finding the Fourth Proportional to 28,067.12, 42,078.48 and 10,535

Step by Step Solution

1. Step 1: Write the proportion equation
   28,067.12 : 42,078.48 = 10,535 : x
2. Step 2: Convert to fraction form
   28,067.12/42,078.48 = 10,535/x
3. Step 3: Cross multiply
   28,067.12x = 42,078.48 × 10,535
4. Step 4: Simplify right side
   28,067.12x = 443,296,786.80
5. Step 5: Solve for x
   x = 443,296,786.80/28,067.12
6. Step 6: Final answer
   x = 15,794.17