Finding the Fourth Proportional to 72,448.62, 99,983.89 and 40,619.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,448.62 : 99,983.89 = 40,619.58 : x
2. Step 2: Convert to fraction form
   72,448.62/99,983.89 = 40,619.58/x
3. Step 3: Cross multiply
   72,448.62x = 99,983.89 × 40,619.58
4. Step 4: Simplify right side
   72,448.62x = 4,061,303,618.57
5. Step 5: Solve for x
   x = 4,061,303,618.57/72,448.62
6. Step 6: Final answer
   x = 56,057.71