Finding the Fourth Proportional to 72,185.37, 99,616.41 and 39,924.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,185.37 : 99,616.41 = 39,924.69 : x
2. Step 2: Convert to fraction form
   72,185.37/99,616.41 = 39,924.69/x
3. Step 3: Cross multiply
   72,185.37x = 99,616.41 × 39,924.69
4. Step 4: Simplify right side
   72,185.37x = 3,977,154,288.16
5. Step 5: Solve for x
   x = 3,977,154,288.16/72,185.37
6. Step 6: Final answer
   x = 55,096.40