Finding the Third Proportional to 2,175,644 and 4,712,878

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175,644 : 4,712,878 = 4,712,878 : x
2. Step 2: Convert to fraction form
   2,175,644/4,712,878 = 4,712,878/x
3. Step 3: Cross multiply
   2,175,644x = 4,712,878 × 4,712,878
4. Step 4: Simplify right side
   2,175,644x = 22,211,219,042,884
5. Step 5: Solve for x
   x = 22,211,219,042,884/2,175,644
6. Step 6: Final answer
   x = 10,209,031.92