Finding the Third Proportional to 9,290,477 and 21,861,221

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290,477 : 21,861,221 = 21,861,221 : x
2. Step 2: Convert to fraction form
   9,290,477/21,861,221 = 21,861,221/x
3. Step 3: Cross multiply
   9,290,477x = 21,861,221 × 21,861,221
4. Step 4: Simplify right side
   9,290,477x = 477,912,983,610,841
5. Step 5: Solve for x
   x = 477,912,983,610,841/9,290,477
6. Step 6: Final answer
   x = 51,441,167.51