Finding the Third Proportional to 78,868.50 and 168,810

Step by Step Solution

1. Step 1: Write the proportion equation
   78,868.50 : 168,810 = 168,810 : x
2. Step 2: Convert to fraction form
   78,868.50/168,810 = 168,810/x
3. Step 3: Cross multiply
   78,868.50x = 168,810 × 168,810
4. Step 4: Simplify right side
   78,868.50x = 28,496,816,100
5. Step 5: Solve for x
   x = 28,496,816,100/78,868.50
6. Step 6: Final answer
   x = 361,320.63