Finding the Third Proportional to 72,642 and 155,136

Step by Step Solution

1. Step 1: Write the proportion equation
   72,642 : 155,136 = 155,136 : x
2. Step 2: Convert to fraction form
   72,642/155,136 = 155,136/x
3. Step 3: Cross multiply
   72,642x = 155,136 × 155,136
4. Step 4: Simplify right side
   72,642x = 24,067,178,496
5. Step 5: Solve for x
   x = 24,067,178,496/72,642
6. Step 6: Final answer
   x = 331,312.17