Finding the Third Proportional to 81,520 and 168,116

Step by Step Solution

1. Step 1: Write the proportion equation
   81,520 : 168,116 = 168,116 : x
2. Step 2: Convert to fraction form
   81,520/168,116 = 168,116/x
3. Step 3: Cross multiply
   81,520x = 168,116 × 168,116
4. Step 4: Simplify right side
   81,520x = 28,262,989,456
5. Step 5: Solve for x
   x = 28,262,989,456/81,520
6. Step 6: Final answer
   x = 346,700.07