Finding the Third Proportional to 4,386,389 and 9,781,334

Step by Step Solution

1. Step 1: Write the proportion equation
   4,386,389 : 9,781,334 = 9,781,334 : x
2. Step 2: Convert to fraction form
   4,386,389/9,781,334 = 9,781,334/x
3. Step 3: Cross multiply
   4,386,389x = 9,781,334 × 9,781,334
4. Step 4: Simplify right side
   4,386,389x = 95,674,494,819,556
5. Step 5: Solve for x
   x = 95,674,494,819,556/4,386,389
6. Step 6: Final answer
   x = 21,811,675.80