Finding the Third Proportional to 6,078,378 and 12,970,320

Step by Step Solution

1. Step 1: Write the proportion equation
   6,078,378 : 12,970,320 = 12,970,320 : x
2. Step 2: Convert to fraction form
   6,078,378/12,970,320 = 12,970,320/x
3. Step 3: Cross multiply
   6,078,378x = 12,970,320 × 12,970,320
4. Step 4: Simplify right side
   6,078,378x = 168,229,200,902,400
5. Step 5: Solve for x
   x = 168,229,200,902,400/6,078,378
6. Step 6: Final answer
   x = 27,676,659.94