Finding the Third Proportional to 3,561,872 and 7,921,000

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561,872 : 7,921,000 = 7,921,000 : x
2. Step 2: Convert to fraction form
   3,561,872/7,921,000 = 7,921,000/x
3. Step 3: Cross multiply
   3,561,872x = 7,921,000 × 7,921,000
4. Step 4: Simplify right side
   3,561,872x = 62,742,241,000,000
5. Step 5: Solve for x
   x = 62,742,241,000,000/3,561,872
6. Step 6: Final answer
   x = 17,614,962.30