Finding the Fourth Proportional to 72,059.94, 99,441.78 and 40,229.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,059.94 : 99,441.78 = 40,229.36 : x
2. Step 2: Convert to fraction form
   72,059.94/99,441.78 = 40,229.36/x
3. Step 3: Cross multiply
   72,059.94x = 99,441.78 × 40,229.36
4. Step 4: Simplify right side
   72,059.94x = 4,000,479,166.66
5. Step 5: Solve for x
   x = 4,000,479,166.66/72,059.94
6. Step 6: Final answer
   x = 55,515.99