Finding the Third Proportional to 10,430,964 and 21,156,711

Step by Step Solution

1. Step 1: Write the proportion equation
   10,430,964 : 21,156,711 = 21,156,711 : x
2. Step 2: Convert to fraction form
   10,430,964/21,156,711 = 21,156,711/x
3. Step 3: Cross multiply
   10,430,964x = 21,156,711 × 21,156,711
4. Step 4: Simplify right side
   10,430,964x = 447,606,420,337,521
5. Step 5: Solve for x
   x = 447,606,420,337,521/10,430,964
6. Step 6: Final answer
   x = 42,911,318.68