Finding the Third Proportional to 148,534.50 and 309,309

Step by Step Solution

1. Step 1: Write the proportion equation
   148,534.50 : 309,309 = 309,309 : x
2. Step 2: Convert to fraction form
   148,534.50/309,309 = 309,309/x
3. Step 3: Cross multiply
   148,534.50x = 309,309 × 309,309
4. Step 4: Simplify right side
   148,534.50x = 95,672,057,481
5. Step 5: Solve for x
   x = 95,672,057,481/148,534.50
6. Step 6: Final answer
   x = 644,106.64