Finding the Third Proportional to 78,920 and 169,050

Step by Step Solution

1. Step 1: Write the proportion equation
   78,920 : 169,050 = 169,050 : x
2. Step 2: Convert to fraction form
   78,920/169,050 = 169,050/x
3. Step 3: Cross multiply
   78,920x = 169,050 × 169,050
4. Step 4: Simplify right side
   78,920x = 28,577,902,500
5. Step 5: Solve for x
   x = 28,577,902,500/78,920
6. Step 6: Final answer
   x = 362,112.30