Finding the Fourth Proportional to 72,457.72, 99,991.64 and 40,626.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72,457.72 : 99,991.64 = 40,626.62 : x
2. Step 2: Convert to fraction form
   72,457.72/99,991.64 = 40,626.62/x
3. Step 3: Cross multiply
   72,457.72x = 99,991.64 × 40,626.62
4. Step 4: Simplify right side
   72,457.72x = 4,062,322,361.46
5. Step 5: Solve for x
   x = 4,062,322,361.46/72,457.72
6. Step 6: Final answer
   x = 56,064.73