Finding the Third Proportional to 144,136 and 231,591

Step by Step Solution

1. Step 1: Write the proportion equation
   144,136 : 231,591 = 231,591 : x
2. Step 2: Convert to fraction form
   144,136/231,591 = 231,591/x
3. Step 3: Cross multiply
   144,136x = 231,591 × 231,591
4. Step 4: Simplify right side
   144,136x = 53,634,391,281
5. Step 5: Solve for x
   x = 53,634,391,281/144,136
6. Step 6: Final answer
   x = 372,109.61