Finding the Fourth Proportional to 72,447.24, 99,982.02 and 40,618.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,447.24 : 99,982.02 = 40,618.20 : x
2. Step 2: Convert to fraction form
   72,447.24/99,982.02 = 40,618.20/x
3. Step 3: Cross multiply
   72,447.24x = 99,982.02 × 40,618.20
4. Step 4: Simplify right side
   72,447.24x = 4,061,089,684.76
5. Step 5: Solve for x
   x = 4,061,089,684.76/72,447.24
6. Step 6: Final answer
   x = 56,055.82