Finding the Third Proportional to 166,455 and 257,450.91

Step by Step Solution

1. Step 1: Write the proportion equation
   166,455 : 257,450.91 = 257,450.91 : x
2. Step 2: Convert to fraction form
   166,455/257,450.91 = 257,450.91/x
3. Step 3: Cross multiply
   166,455x = 257,450.91 × 257,450.91
4. Step 4: Simplify right side
   166,455x = 66,280,969,128.95
5. Step 5: Solve for x
   x = 66,280,969,128.95/166,455
6. Step 6: Final answer
   x = 398,191.52