Finding the Third Proportional to 863,405 and 1,307,150

Step by Step Solution

1. Step 1: Write the proportion equation
   863,405 : 1,307,150 = 1,307,150 : x
2. Step 2: Convert to fraction form
   863,405/1,307,150 = 1,307,150/x
3. Step 3: Cross multiply
   863,405x = 1,307,150 × 1,307,150
4. Step 4: Simplify right side
   863,405x = 1,708,641,122,500
5. Step 5: Solve for x
   x = 1,708,641,122,500/863,405
6. Step 6: Final answer
   x = 1,978,956.71