Finding the Third Proportional to 166,108 and 389,964

Step by Step Solution

1. Step 1: Write the proportion equation
   166,108 : 389,964 = 389,964 : x
2. Step 2: Convert to fraction form
   166,108/389,964 = 389,964/x
3. Step 3: Cross multiply
   166,108x = 389,964 × 389,964
4. Step 4: Simplify right side
   166,108x = 152,071,921,296
5. Step 5: Solve for x
   x = 152,071,921,296/166,108
6. Step 6: Final answer
   x = 915,500.28