Finding the Fourth Proportional to 72,196.56, 99,632.97 and 40,365.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,196.56 : 99,632.97 = 40,365.18 : x
2. Step 2: Convert to fraction form
   72,196.56/99,632.97 = 40,365.18/x
3. Step 3: Cross multiply
   72,196.56x = 99,632.97 × 40,365.18
4. Step 4: Simplify right side
   72,196.56x = 4,021,702,767.98
5. Step 5: Solve for x
   x = 4,021,702,767.98/72,196.56
6. Step 6: Final answer
   x = 55,704.91