Finding the Fourth Proportional to 445,977.50, 668,960.37 and 109,021.10

Step by Step Solution

1. Step 1: Write the proportion equation
   445,977.50 : 668,960.37 = 109,021.10 : x
2. Step 2: Convert to fraction form
   445,977.50/668,960.37 = 109,021.10/x
3. Step 3: Cross multiply
   445,977.50x = 668,960.37 × 109,021.10
4. Step 4: Simplify right side
   445,977.50x = 72,930,792,049.01
5. Step 5: Solve for x
   x = 72,930,792,049.01/445,977.50
6. Step 6: Final answer
   x = 163,530.21