Finding the Third Proportional to 7,981,684 and 12,171,804

Step by Step Solution

1. Step 1: Write the proportion equation
   7,981,684 : 12,171,804 = 12,171,804 : x
2. Step 2: Convert to fraction form
   7,981,684/12,171,804 = 12,171,804/x
3. Step 3: Cross multiply
   7,981,684x = 12,171,804 × 12,171,804
4. Step 4: Simplify right side
   7,981,684x = 148,152,812,614,416
5. Step 5: Solve for x
   x = 148,152,812,614,416/7,981,684
6. Step 6: Final answer
   x = 18,561,598.36