Finding the Third Proportional to 9,724,986 and 21,162,420

Step by Step Solution

1. Step 1: Write the proportion equation
   9,724,986 : 21,162,420 = 21,162,420 : x
2. Step 2: Convert to fraction form
   9,724,986/21,162,420 = 21,162,420/x
3. Step 3: Cross multiply
   9,724,986x = 21,162,420 × 21,162,420
4. Step 4: Simplify right side
   9,724,986x = 447,848,020,256,400
5. Step 5: Solve for x
   x = 447,848,020,256,400/9,724,986
6. Step 6: Final answer
   x = 46,051,276.60