Finding the Third Proportional to 9,321,642 and 19,938,528

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321,642 : 19,938,528 = 19,938,528 : x
2. Step 2: Convert to fraction form
   9,321,642/19,938,528 = 19,938,528/x
3. Step 3: Cross multiply
   9,321,642x = 19,938,528 × 19,938,528
4. Step 4: Simplify right side
   9,321,642x = 397,544,898,806,784
5. Step 5: Solve for x
   x = 397,544,898,806,784/9,321,642
6. Step 6: Final answer
   x = 42,647,518.41