Finding the Third Proportional to 7,981,670 and 12,171,783

Step by Step Solution

1. Step 1: Write the proportion equation
   7,981,670 : 12,171,783 = 12,171,783 : x
2. Step 2: Convert to fraction form
   7,981,670/12,171,783 = 12,171,783/x
3. Step 3: Cross multiply
   7,981,670x = 12,171,783 × 12,171,783
4. Step 4: Simplify right side
   7,981,670x = 148,152,301,399,089
5. Step 5: Solve for x
   x = 148,152,301,399,089/7,981,670
6. Step 6: Final answer
   x = 18,561,566.86