Finding the Third Proportional to 143,698 and 309,010

Step by Step Solution

1. Step 1: Write the proportion equation
   143,698 : 309,010 = 309,010 : x
2. Step 2: Convert to fraction form
   143,698/309,010 = 309,010/x
3. Step 3: Cross multiply
   143,698x = 309,010 × 309,010
4. Step 4: Simplify right side
   143,698x = 95,487,180,100
5. Step 5: Solve for x
   x = 95,487,180,100/143,698
6. Step 6: Final answer
   x = 664,499.02