Finding the Third Proportional to 99,764.50 and 215,355

Step by Step Solution

1. Step 1: Write the proportion equation
   99,764.50 : 215,355 = 215,355 : x
2. Step 2: Convert to fraction form
   99,764.50/215,355 = 215,355/x
3. Step 3: Cross multiply
   99,764.50x = 215,355 × 215,355
4. Step 4: Simplify right side
   99,764.50x = 46,377,776,025
5. Step 5: Solve for x
   x = 46,377,776,025/99,764.50
6. Step 6: Final answer
   x = 464,872.54