Finding the Third Proportional to 399,019.50 and 875,556

Step by Step Solution

1. Step 1: Write the proportion equation
   399,019.50 : 875,556 = 875,556 : x
2. Step 2: Convert to fraction form
   399,019.50/875,556 = 875,556/x
3. Step 3: Cross multiply
   399,019.50x = 875,556 × 875,556
4. Step 4: Simplify right side
   399,019.50x = 766,598,309,136
5. Step 5: Solve for x
   x = 766,598,309,136/399,019.50
6. Step 6: Final answer
   x = 1,921,205.13