Finding the Third Proportional to 578,998.50 and 1,275,789

Step by Step Solution

1. Step 1: Write the proportion equation
   578,998.50 : 1,275,789 = 1,275,789 : x
2. Step 2: Convert to fraction form
   578,998.50/1,275,789 = 1,275,789/x
3. Step 3: Cross multiply
   578,998.50x = 1,275,789 × 1,275,789
4. Step 4: Simplify right side
   578,998.50x = 1,627,637,572,521
5. Step 5: Solve for x
   x = 1,627,637,572,521/578,998.50
6. Step 6: Final answer
   x = 2,811,125.72