Finding the Third Proportional to 144,958 and 318,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,958 : 318,499.50 = 318,499.50 : x
2. Step 2: Convert to fraction form
   144,958/318,499.50 = 318,499.50/x
3. Step 3: Cross multiply
   144,958x = 318,499.50 × 318,499.50
4. Step 4: Simplify right side
   144,958x = 101,441,931,500.25
5. Step 5: Solve for x
   x = 101,441,931,500.25/144,958
6. Step 6: Final answer
   x = 699,802.23