Finding the Fourth Proportional to 72,198.72, 99,633.96 and 40,367.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,198.72 : 99,633.96 = 40,367.52 : x
2. Step 2: Convert to fraction form
   72,198.72/99,633.96 = 40,367.52/x
3. Step 3: Cross multiply
   72,198.72x = 99,633.96 × 40,367.52
4. Step 4: Simplify right side
   72,198.72x = 4,021,975,872.98
5. Step 5: Solve for x
   x = 4,021,975,872.98/72,198.72
6. Step 6: Final answer
   x = 55,707.02