Finding the Third Proportional to 143,235 and 315,061

Step by Step Solution

1. Step 1: Write the proportion equation
   143,235 : 315,061 = 315,061 : x
2. Step 2: Convert to fraction form
   143,235/315,061 = 315,061/x
3. Step 3: Cross multiply
   143,235x = 315,061 × 315,061
4. Step 4: Simplify right side
   143,235x = 99,263,433,721
5. Step 5: Solve for x
   x = 99,263,433,721/143,235
6. Step 6: Final answer
   x = 693,011.02