Finding the Third Proportional to 99,144 and 215,136

Step by Step Solution

1. Step 1: Write the proportion equation
   99,144 : 215,136 = 215,136 : x
2. Step 2: Convert to fraction form
   99,144/215,136 = 215,136/x
3. Step 3: Cross multiply
   99,144x = 215,136 × 215,136
4. Step 4: Simplify right side
   99,144x = 46,283,498,496
5. Step 5: Solve for x
   x = 46,283,498,496/99,144
6. Step 6: Final answer
   x = 466,831.06