Finding the Third Proportional to 3,292,420 and 7,188,128

Step by Step Solution

1. Step 1: Write the proportion equation
   3,292,420 : 7,188,128 = 7,188,128 : x
2. Step 2: Convert to fraction form
   3,292,420/7,188,128 = 7,188,128/x
3. Step 3: Cross multiply
   3,292,420x = 7,188,128 × 7,188,128
4. Step 4: Simplify right side
   3,292,420x = 51,669,184,144,384
5. Step 5: Solve for x
   x = 51,669,184,144,384/3,292,420
6. Step 6: Final answer
   x = 15,693,375.74