Finding the Third Proportional to 8,378,260 and 12,893,990

Step by Step Solution

1. Step 1: Write the proportion equation
   8,378,260 : 12,893,990 = 12,893,990 : x
2. Step 2: Convert to fraction form
   8,378,260/12,893,990 = 12,893,990/x
3. Step 3: Cross multiply
   8,378,260x = 12,893,990 × 12,893,990
4. Step 4: Simplify right side
   8,378,260x = 166,254,978,120,100
5. Step 5: Solve for x
   x = 166,254,978,120,100/8,378,260
6. Step 6: Final answer
   x = 19,843,616.47