Finding the Fourth Proportional to 71,844.62, 99,141.72 and 39,578.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,844.62 : 99,141.72 = 39,578.18 : x
2. Step 2: Convert to fraction form
   71,844.62/99,141.72 = 39,578.18/x
3. Step 3: Cross multiply
   71,844.62x = 99,141.72 × 39,578.18
4. Step 4: Simplify right side
   71,844.62x = 3,923,848,839.67
5. Step 5: Solve for x
   x = 3,923,848,839.67/71,844.62
6. Step 6: Final answer
   x = 54,615.76