Finding the Third Proportional to 78,687 and 169,810.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,687 : 169,810.50 = 169,810.50 : x
2. Step 2: Convert to fraction form
   78,687/169,810.50 = 169,810.50/x
3. Step 3: Cross multiply
   78,687x = 169,810.50 × 169,810.50
4. Step 4: Simplify right side
   78,687x = 28,835,605,910.25
5. Step 5: Solve for x
   x = 28,835,605,910.25/78,687
6. Step 6: Final answer
   x = 366,459.59