Finding the Third Proportional to 78,938.50 and 169,136

Step by Step Solution

1. Step 1: Write the proportion equation
   78,938.50 : 169,136 = 169,136 : x
2. Step 2: Convert to fraction form
   78,938.50/169,136 = 169,136/x
3. Step 3: Cross multiply
   78,938.50x = 169,136 × 169,136
4. Step 4: Simplify right side
   78,938.50x = 28,606,986,496
5. Step 5: Solve for x
   x = 28,606,986,496/78,938.50
6. Step 6: Final answer
   x = 362,395.87