Finding the Third Proportional to 148,770 and 309,573

Step by Step Solution

1. Step 1: Write the proportion equation
   148,770 : 309,573 = 309,573 : x
2. Step 2: Convert to fraction form
   148,770/309,573 = 309,573/x
3. Step 3: Cross multiply
   148,770x = 309,573 × 309,573
4. Step 4: Simplify right side
   148,770x = 95,835,442,329
5. Step 5: Solve for x
   x = 95,835,442,329/148,770
6. Step 6: Final answer
   x = 644,185.27