Finding the Fourth Proportional to 72,044.48, 99,419.72 and 40,216.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,044.48 : 99,419.72 = 40,216.34 : x
2. Step 2: Convert to fraction form
   72,044.48/99,419.72 = 40,216.34/x
3. Step 3: Cross multiply
   72,044.48x = 99,419.72 × 40,216.34
4. Step 4: Simplify right side
   72,044.48x = 3,998,297,262.22
5. Step 5: Solve for x
   x = 3,998,297,262.22/72,044.48
6. Step 6: Final answer
   x = 55,497.62