Finding the Third Proportional to 7,981,680 and 12,171,798

Step by Step Solution

1. Step 1: Write the proportion equation
   7,981,680 : 12,171,798 = 12,171,798 : x
2. Step 2: Convert to fraction form
   7,981,680/12,171,798 = 12,171,798/x
3. Step 3: Cross multiply
   7,981,680x = 12,171,798 × 12,171,798
4. Step 4: Simplify right side
   7,981,680x = 148,152,666,552,804
5. Step 5: Solve for x
   x = 148,152,666,552,804/7,981,680
6. Step 6: Final answer
   x = 18,561,589.36