Finding the Third Proportional to 78,939 and 169,136

Step by Step Solution

1. Step 1: Write the proportion equation
   78,939 : 169,136 = 169,136 : x
2. Step 2: Convert to fraction form
   78,939/169,136 = 169,136/x
3. Step 3: Cross multiply
   78,939x = 169,136 × 169,136
4. Step 4: Simplify right side
   78,939x = 28,606,986,496
5. Step 5: Solve for x
   x = 28,606,986,496/78,939
6. Step 6: Final answer
   x = 362,393.58