Finding the Third Proportional to 5,429,222 and 8,398,902

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429,222 : 8,398,902 = 8,398,902 : x
2. Step 2: Convert to fraction form
   5,429,222/8,398,902 = 8,398,902/x
3. Step 3: Cross multiply
   5,429,222x = 8,398,902 × 8,398,902
4. Step 4: Simplify right side
   5,429,222x = 70,541,554,805,604
5. Step 5: Solve for x
   x = 70,541,554,805,604/5,429,222
6. Step 6: Final answer
   x = 12,992,939.84