Finding the Third Proportional to 840,978 and 1,271,502

Step by Step Solution

1. Step 1: Write the proportion equation
   840,978 : 1,271,502 = 1,271,502 : x
2. Step 2: Convert to fraction form
   840,978/1,271,502 = 1,271,502/x
3. Step 3: Cross multiply
   840,978x = 1,271,502 × 1,271,502
4. Step 4: Simplify right side
   840,978x = 1,616,717,336,004
5. Step 5: Solve for x
   x = 1,616,717,336,004/840,978
6. Step 6: Final answer
   x = 1,922,425.24