Finding the Third Proportional to 105,136 and 243,144

Step by Step Solution

1. Step 1: Write the proportion equation
   105,136 : 243,144 = 243,144 : x
2. Step 2: Convert to fraction form
   105,136/243,144 = 243,144/x
3. Step 3: Cross multiply
   105,136x = 243,144 × 243,144
4. Step 4: Simplify right side
   105,136x = 59,119,004,736
5. Step 5: Solve for x
   x = 59,119,004,736/105,136
6. Step 6: Final answer
   x = 562,309.82