Finding the Third Proportional to 12,979,863 and 20,177,761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979,863 : 20,177,761.50 = 20,177,761.50 : x
2. Step 2: Convert to fraction form
   12,979,863/20,177,761.50 = 20,177,761.50/x
3. Step 3: Cross multiply
   12,979,863x = 20,177,761.50 × 20,177,761.50
4. Step 4: Simplify right side
   12,979,863x = 407,142,059,150,882.25
5. Step 5: Solve for x
   x = 407,142,059,150,882.25/12,979,863
6. Step 6: Final answer
   x = 31,367,207.74