Finding the Third Proportional to 10,427,470 and 21,808,320

Step by Step Solution

1. Step 1: Write the proportion equation
   10,427,470 : 21,808,320 = 21,808,320 : x
2. Step 2: Convert to fraction form
   10,427,470/21,808,320 = 21,808,320/x
3. Step 3: Cross multiply
   10,427,470x = 21,808,320 × 21,808,320
4. Step 4: Simplify right side
   10,427,470x = 475,602,821,222,400
5. Step 5: Solve for x
   x = 475,602,821,222,400/10,427,470
6. Step 6: Final answer
   x = 45,610,567.21