Finding the Third Proportional to 149,116.50 and 318,327

Step by Step Solution

1. Step 1: Write the proportion equation
   149,116.50 : 318,327 = 318,327 : x
2. Step 2: Convert to fraction form
   149,116.50/318,327 = 318,327/x
3. Step 3: Cross multiply
   149,116.50x = 318,327 × 318,327
4. Step 4: Simplify right side
   149,116.50x = 101,332,078,929
5. Step 5: Solve for x
   x = 101,332,078,929/149,116.50
6. Step 6: Final answer
   x = 679,549.74