Finding the Third Proportional to 78,810 and 166,500

Step by Step Solution

1. Step 1: Write the proportion equation
   78,810 : 166,500 = 166,500 : x
2. Step 2: Convert to fraction form
   78,810/166,500 = 166,500/x
3. Step 3: Cross multiply
   78,810x = 166,500 × 166,500
4. Step 4: Simplify right side
   78,810x = 27,722,250,000
5. Step 5: Solve for x
   x = 27,722,250,000/78,810
6. Step 6: Final answer
   x = 351,760.56