Finding the Fourth Proportional to 106,201.72, 146,481.48 and 72,150.74

Step by Step Solution

1. Step 1: Write the proportion equation
   106,201.72 : 146,481.48 = 72,150.74 : x
2. Step 2: Convert to fraction form
   106,201.72/146,481.48 = 72,150.74/x
3. Step 3: Cross multiply
   106,201.72x = 146,481.48 × 72,150.74
4. Step 4: Simplify right side
   106,201.72x = 10,568,747,178.30
5. Step 5: Solve for x
   x = 10,568,747,178.30/106,201.72
6. Step 6: Final answer
   x = 99,515.78