Finding the Third Proportional to 248,487 and 387,493.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,487 : 387,493.50 = 387,493.50 : x
2. Step 2: Convert to fraction form
   248,487/387,493.50 = 387,493.50/x
3. Step 3: Cross multiply
   248,487x = 387,493.50 × 387,493.50
4. Step 4: Simplify right side
   248,487x = 150,151,212,542.25
5. Step 5: Solve for x
   x = 150,151,212,542.25/248,487
6. Step 6: Final answer
   x = 604,261.84