Finding the Fourth Proportional to 296,745.10, 445,118.20 and 72,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   296,745.10 : 445,118.20 = 72,105.72 : x
2. Step 2: Convert to fraction form
   296,745.10/445,118.20 = 72,105.72/x
3. Step 3: Cross multiply
   296,745.10x = 445,118.20 × 72,105.72
4. Step 4: Simplify right side
   296,745.10x = 32,095,568,296.10
5. Step 5: Solve for x
   x = 32,095,568,296.10/296,745.10
6. Step 6: Final answer
   x = 108,158.71