Finding the Third Proportional to 4,243,972 and 8,271,368

Step by Step Solution

1. Step 1: Write the proportion equation
   4,243,972 : 8,271,368 = 8,271,368 : x
2. Step 2: Convert to fraction form
   4,243,972/8,271,368 = 8,271,368/x
3. Step 3: Cross multiply
   4,243,972x = 8,271,368 × 8,271,368
4. Step 4: Simplify right side
   4,243,972x = 68,415,528,591,424
5. Step 5: Solve for x
   x = 68,415,528,591,424/4,243,972
6. Step 6: Final answer
   x = 16,120,636.19