Finding the Third Proportional to 9,790,510 and 21,208,172

Step by Step Solution

1. Step 1: Write the proportion equation
   9,790,510 : 21,208,172 = 21,208,172 : x
2. Step 2: Convert to fraction form
   9,790,510/21,208,172 = 21,208,172/x
3. Step 3: Cross multiply
   9,790,510x = 21,208,172 × 21,208,172
4. Step 4: Simplify right side
   9,790,510x = 449,786,559,581,584
5. Step 5: Solve for x
   x = 449,786,559,581,584/9,790,510
6. Step 6: Final answer
   x = 45,941,075.55