Finding the Fourth Proportional to 71,851, 99,151.92 and 40,018.28

Step by Step Solution

1. Step 1: Write the proportion equation
   71,851 : 99,151.92 = 40,018.28 : x
2. Step 2: Convert to fraction form
   71,851/99,151.92 = 40,018.28/x
3. Step 3: Cross multiply
   71,851x = 99,151.92 × 40,018.28
4. Step 4: Simplify right side
   71,851x = 3,967,889,297.10
5. Step 5: Solve for x
   x = 3,967,889,297.10/71,851
6. Step 6: Final answer
   x = 55,223.86