Finding the Third Proportional to 1,782,580 and 3,891,812

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782,580 : 3,891,812 = 3,891,812 : x
2. Step 2: Convert to fraction form
   1,782,580/3,891,812 = 3,891,812/x
3. Step 3: Cross multiply
   1,782,580x = 3,891,812 × 3,891,812
4. Step 4: Simplify right side
   1,782,580x = 15,146,200,643,344
5. Step 5: Solve for x
   x = 15,146,200,643,344/1,782,580
6. Step 6: Final answer
   x = 8,496,785.92