Finding the Third Proportional to 385,669.50 and 830,605

Step by Step Solution

1. Step 1: Write the proportion equation
   385,669.50 : 830,605 = 830,605 : x
2. Step 2: Convert to fraction form
   385,669.50/830,605 = 830,605/x
3. Step 3: Cross multiply
   385,669.50x = 830,605 × 830,605
4. Step 4: Simplify right side
   385,669.50x = 689,904,666,025
5. Step 5: Solve for x
   x = 689,904,666,025/385,669.50
6. Step 6: Final answer
   x = 1,788,849.43