Finding the Third Proportional to 9,992,421 and 21,791,988

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992,421 : 21,791,988 = 21,791,988 : x
2. Step 2: Convert to fraction form
   9,992,421/21,791,988 = 21,791,988/x
3. Step 3: Cross multiply
   9,992,421x = 21,791,988 × 21,791,988
4. Step 4: Simplify right side
   9,992,421x = 474,890,740,992,144
5. Step 5: Solve for x
   x = 474,890,740,992,144/9,992,421
6. Step 6: Final answer
   x = 47,525,093.37