Finding the Third Proportional to 3,644,870 and 8,437,931

Step by Step Solution

1. Step 1: Write the proportion equation
   3,644,870 : 8,437,931 = 8,437,931 : x
2. Step 2: Convert to fraction form
   3,644,870/8,437,931 = 8,437,931/x
3. Step 3: Cross multiply
   3,644,870x = 8,437,931 × 8,437,931
4. Step 4: Simplify right side
   3,644,870x = 71,198,679,560,761
5. Step 5: Solve for x
   x = 71,198,679,560,761/3,644,870
6. Step 6: Final answer
   x = 19,533,942.11