Finding the Third Proportional to 3,840,778 and 8,276,420

Step by Step Solution

1. Step 1: Write the proportion equation
   3,840,778 : 8,276,420 = 8,276,420 : x
2. Step 2: Convert to fraction form
   3,840,778/8,276,420 = 8,276,420/x
3. Step 3: Cross multiply
   3,840,778x = 8,276,420 × 8,276,420
4. Step 4: Simplify right side
   3,840,778x = 68,499,128,016,400
5. Step 5: Solve for x
   x = 68,499,128,016,400/3,840,778
6. Step 6: Final answer
   x = 17,834,701.20