Finding the Third Proportional to 143,120,142 and 314,356,644

Step by Step Solution

1. Step 1: Write the proportion equation
   143,120,142 : 314,356,644 = 314,356,644 : x
2. Step 2: Convert to fraction form
   143,120,142/314,356,644 = 314,356,644/x
3. Step 3: Cross multiply
   143,120,142x = 314,356,644 × 314,356,644
4. Step 4: Simplify right side
   143,120,142x = 98,820,099,626,942,736
5. Step 5: Solve for x
   x = 98,820,099,626,942,736/143,120,142
6. Step 6: Final answer
   x = 690,469,547.10