Finding the Fourth Proportional to 72,462.82, 99,989.06 and 40,196.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,462.82 : 99,989.06 = 40,196.96 : x
2. Step 2: Convert to fraction form
   72,462.82/99,989.06 = 40,196.96/x
3. Step 3: Cross multiply
   72,462.82x = 99,989.06 × 40,196.96
4. Step 4: Simplify right side
   72,462.82x = 4,019,256,245.26
5. Step 5: Solve for x
   x = 4,019,256,245.26/72,462.82
6. Step 6: Final answer
   x = 55,466.46