Finding the Third Proportional to 578,612 and 1,291,360

Step by Step Solution

1. Step 1: Write the proportion equation
   578,612 : 1,291,360 = 1,291,360 : x
2. Step 2: Convert to fraction form
   578,612/1,291,360 = 1,291,360/x
3. Step 3: Cross multiply
   578,612x = 1,291,360 × 1,291,360
4. Step 4: Simplify right side
   578,612x = 1,667,610,649,600
5. Step 5: Solve for x
   x = 1,667,610,649,600/578,612
6. Step 6: Final answer
   x = 2,882,087.91