Finding the Third Proportional to 161,777.50 and 351,499

Step by Step Solution

1. Step 1: Write the proportion equation
   161,777.50 : 351,499 = 351,499 : x
2. Step 2: Convert to fraction form
   161,777.50/351,499 = 351,499/x
3. Step 3: Cross multiply
   161,777.50x = 351,499 × 351,499
4. Step 4: Simplify right side
   161,777.50x = 123,551,547,001
5. Step 5: Solve for x
   x = 123,551,547,001/161,777.50
6. Step 6: Final answer
   x = 763,712.80