Finding the Third Proportional to 99,772.03 and 216,766.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,772.03 : 216,766.69 = 216,766.69 : x
2. Step 2: Convert to fraction form
   99,772.03/216,766.69 = 216,766.69/x
3. Step 3: Cross multiply
   99,772.03x = 216,766.69 × 216,766.69
4. Step 4: Simplify right side
   99,772.03x = 46,987,796,809.72
5. Step 5: Solve for x
   x = 46,987,796,809.72/99,772.03
6. Step 6: Final answer
   x = 470,951.59