Finding the Fourth Proportional to 72,003.24, 99,369.25 and 40,172.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,003.24 : 99,369.25 = 40,172.83 : x
2. Step 2: Convert to fraction form
   72,003.24/99,369.25 = 40,172.83/x
3. Step 3: Cross multiply
   72,003.24x = 99,369.25 × 40,172.83
4. Step 4: Simplify right side
   72,003.24x = 3,991,943,638.62
5. Step 5: Solve for x
   x = 3,991,943,638.62/72,003.24
6. Step 6: Final answer
   x = 55,441.17