Finding the Third Proportional to 67,728.66 and 99,645.19

Step by Step Solution

1. Step 1: Write the proportion equation
   67,728.66 : 99,645.19 = 99,645.19 : x
2. Step 2: Convert to fraction form
   67,728.66/99,645.19 = 99,645.19/x
3. Step 3: Cross multiply
   67,728.66x = 99,645.19 × 99,645.19
4. Step 4: Simplify right side
   67,728.66x = 9,929,163,391.91
5. Step 5: Solve for x
   x = 9,929,163,391.91/67,728.66
6. Step 6: Final answer
   x = 146,602.10