Finding the Third Proportional to 4,575,618 and 9,860,432

Step by Step Solution

1. Step 1: Write the proportion equation
   4,575,618 : 9,860,432 = 9,860,432 : x
2. Step 2: Convert to fraction form
   4,575,618/9,860,432 = 9,860,432/x
3. Step 3: Cross multiply
   4,575,618x = 9,860,432 × 9,860,432
4. Step 4: Simplify right side
   4,575,618x = 97,228,119,226,624
5. Step 5: Solve for x
   x = 97,228,119,226,624/4,575,618
6. Step 6: Final answer
   x = 21,249,177.54