Finding the Third Proportional to 9,721,634 and 21,273,172

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721,634 : 21,273,172 = 21,273,172 : x
2. Step 2: Convert to fraction form
   9,721,634/21,273,172 = 21,273,172/x
3. Step 3: Cross multiply
   9,721,634x = 21,273,172 × 21,273,172
4. Step 4: Simplify right side
   9,721,634x = 452,547,846,941,584
5. Step 5: Solve for x
   x = 452,547,846,941,584/9,721,634
6. Step 6: Final answer
   x = 46,550,594.99