Finding the Fourth Proportional to 72,048.48, 99,424.83 and 40,216.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,048.48 : 99,424.83 = 40,216.69 : x
2. Step 2: Convert to fraction form
   72,048.48/99,424.83 = 40,216.69/x
3. Step 3: Cross multiply
   72,048.48x = 99,424.83 × 40,216.69
4. Step 4: Simplify right side
   72,048.48x = 3,998,537,566.41
5. Step 5: Solve for x
   x = 3,998,537,566.41/72,048.48
6. Step 6: Final answer
   x = 55,497.88