Finding the Fourth Proportional to 71,997, 99,355.57 and 40,165.86

Step by Step Solution

1. Step 1: Write the proportion equation
   71,997 : 99,355.57 = 40,165.86 : x
2. Step 2: Convert to fraction form
   71,997/99,355.57 = 40,165.86/x
3. Step 3: Cross multiply
   71,997x = 99,355.57 × 40,165.86
4. Step 4: Simplify right side
   71,997x = 3,990,701,914.84
5. Step 5: Solve for x
   x = 3,990,701,914.84/71,997
6. Step 6: Final answer
   x = 55,428.73