Finding the Fourth Proportional to 71,976.49, 99,327.69 and 40,147.45

Step by Step Solution

1. Step 1: Write the proportion equation
   71,976.49 : 99,327.69 = 40,147.45 : x
2. Step 2: Convert to fraction form
   71,976.49/99,327.69 = 40,147.45/x
3. Step 3: Cross multiply
   71,976.49x = 99,327.69 × 40,147.45
4. Step 4: Simplify right side
   71,976.49x = 3,987,753,467.89
5. Step 5: Solve for x
   x = 3,987,753,467.89/71,976.49
6. Step 6: Final answer
   x = 55,403.56