Finding the Fourth Proportional to 71,791.14, 99,067.89 and 39,519.47

Step by Step Solution

1. Step 1: Write the proportion equation
   71,791.14 : 99,067.89 = 39,519.47 : x
2. Step 2: Convert to fraction form
   71,791.14/99,067.89 = 39,519.47/x
3. Step 3: Cross multiply
   71,791.14x = 99,067.89 × 39,519.47
4. Step 4: Simplify right side
   71,791.14x = 3,915,110,506.82
5. Step 5: Solve for x
   x = 3,915,110,506.82/71,791.14
6. Step 6: Final answer
   x = 54,534.73