Finding the Third Proportional to 144,993 and 318,354.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,993 : 318,354.50 = 318,354.50 : x
2. Step 2: Convert to fraction form
   144,993/318,354.50 = 318,354.50/x
3. Step 3: Cross multiply
   144,993x = 318,354.50 × 318,354.50
4. Step 4: Simplify right side
   144,993x = 101,349,587,670.25
5. Step 5: Solve for x
   x = 101,349,587,670.25/144,993
6. Step 6: Final answer
   x = 698,996.42