Finding the Third Proportional to 148,535.50 and 309,311

Step by Step Solution

1. Step 1: Write the proportion equation
   148,535.50 : 309,311 = 309,311 : x
2. Step 2: Convert to fraction form
   148,535.50/309,311 = 309,311/x
3. Step 3: Cross multiply
   148,535.50x = 309,311 × 309,311
4. Step 4: Simplify right side
   148,535.50x = 95,673,294,721
5. Step 5: Solve for x
   x = 95,673,294,721/148,535.50
6. Step 6: Final answer
   x = 644,110.63