Finding the Fourth Proportional to 106,200.72, 146,480.10 and 72,149.74

Step by Step Solution

1. Step 1: Write the proportion equation
   106,200.72 : 146,480.10 = 72,149.74 : x
2. Step 2: Convert to fraction form
   106,200.72/146,480.10 = 72,149.74/x
3. Step 3: Cross multiply
   106,200.72x = 146,480.10 × 72,149.74
4. Step 4: Simplify right side
   106,200.72x = 10,568,500,493.41
5. Step 5: Solve for x
   x = 10,568,500,493.41/106,200.72
6. Step 6: Final answer
   x = 99,514.40