Finding the Fourth Proportional to 71,786.51, 99,063.69 and 39,954.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,786.51 : 99,063.69 = 39,954.72 : x
2. Step 2: Convert to fraction form
   71,786.51/99,063.69 = 39,954.72/x
3. Step 3: Cross multiply
   71,786.51x = 99,063.69 × 39,954.72
4. Step 4: Simplify right side
   71,786.51x = 3,958,062,369.15
5. Step 5: Solve for x
   x = 3,958,062,369.15/71,786.51
6. Step 6: Final answer
   x = 55,136.58