Finding the Fourth Proportional to 72,404.97, 99,918.77 and 40,574.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,404.97 : 99,918.77 = 40,574.09 : x
2. Step 2: Convert to fraction form
   72,404.97/99,918.77 = 40,574.09/x
3. Step 3: Cross multiply
   72,404.97x = 99,918.77 × 40,574.09
4. Step 4: Simplify right side
   72,404.97x = 4,054,112,464.21
5. Step 5: Solve for x
   x = 4,054,112,464.21/72,404.97
6. Step 6: Final answer
   x = 55,992.18