Finding the Third Proportional to 169,276.50 and 257,238

Step by Step Solution

1. Step 1: Write the proportion equation
   169,276.50 : 257,238 = 257,238 : x
2. Step 2: Convert to fraction form
   169,276.50/257,238 = 257,238/x
3. Step 3: Cross multiply
   169,276.50x = 257,238 × 257,238
4. Step 4: Simplify right side
   169,276.50x = 66,171,388,644
5. Step 5: Solve for x
   x = 66,171,388,644/169,276.50
6. Step 6: Final answer
   x = 390,907.12