Finding the Third Proportional to 30,879 and 72,153

Step by Step Solution

1. Step 1: Write the proportion equation
   30,879 : 72,153 = 72,153 : x
2. Step 2: Convert to fraction form
   30,879/72,153 = 72,153/x
3. Step 3: Cross multiply
   30,879x = 72,153 × 72,153
4. Step 4: Simplify right side
   30,879x = 5,206,055,409
5. Step 5: Solve for x
   x = 5,206,055,409/30,879
6. Step 6: Final answer
   x = 168,595.34