Finding the Fourth Proportional to 72,157.43, 99,577.41 and 40,326.33

Step by Step Solution

1. Step 1: Write the proportion equation
   72,157.43 : 99,577.41 = 40,326.33 : x
2. Step 2: Convert to fraction form
   72,157.43/99,577.41 = 40,326.33/x
3. Step 3: Cross multiply
   72,157.43x = 99,577.41 × 40,326.33
4. Step 4: Simplify right side
   72,157.43x = 4,015,591,158.27
5. Step 5: Solve for x
   x = 4,015,591,158.27/72,157.43
6. Step 6: Final answer
   x = 55,650.42