Finding the Fourth Proportional to 72,416.09, 99,928.71 and 40,578.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,416.09 : 99,928.71 = 40,578.84 : x
2. Step 2: Convert to fraction form
   72,416.09/99,928.71 = 40,578.84/x
3. Step 3: Cross multiply
   72,416.09x = 99,928.71 × 40,578.84
4. Step 4: Simplify right side
   72,416.09x = 4,054,991,134.50
5. Step 5: Solve for x
   x = 4,054,991,134.50/72,416.09
6. Step 6: Final answer
   x = 55,995.72