Finding the Fourth Proportional to 72,019.92, 99,382.46 and 40,186.92

Step by Step Solution

1. Step 1: Write the proportion equation
   72,019.92 : 99,382.46 = 40,186.92 : x
2. Step 2: Convert to fraction form
   72,019.92/99,382.46 = 40,186.92/x
3. Step 3: Cross multiply
   72,019.92x = 99,382.46 × 40,186.92
4. Step 4: Simplify right side
   72,019.92x = 3,993,874,969.42
5. Step 5: Solve for x
   x = 3,993,874,969.42/72,019.92
6. Step 6: Final answer
   x = 55,455.14