Finding the Third Proportional to 78,320 and 167,719

Step by Step Solution

1. Step 1: Write the proportion equation
   78,320 : 167,719 = 167,719 : x
2. Step 2: Convert to fraction form
   78,320/167,719 = 167,719/x
3. Step 3: Cross multiply
   78,320x = 167,719 × 167,719
4. Step 4: Simplify right side
   78,320x = 28,129,662,961
5. Step 5: Solve for x
   x = 28,129,662,961/78,320
6. Step 6: Final answer
   x = 359,163.21