Finding the Fourth Proportional to 72,185.33, 99,616.10 and 40,353.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72,185.33 : 99,616.10 = 40,353.55 : x
2. Step 2: Convert to fraction form
   72,185.33/99,616.10 = 40,353.55/x
3. Step 3: Cross multiply
   72,185.33x = 99,616.10 × 40,353.55
4. Step 4: Simplify right side
   72,185.33x = 4,019,862,821.35
5. Step 5: Solve for x
   x = 4,019,862,821.35/72,185.33
6. Step 6: Final answer
   x = 55,688.08