Finding the Third Proportional to 12,957,536 and 20,115,424

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957,536 : 20,115,424 = 20,115,424 : x
2. Step 2: Convert to fraction form
   12,957,536/20,115,424 = 20,115,424/x
3. Step 3: Cross multiply
   12,957,536x = 20,115,424 × 20,115,424
4. Step 4: Simplify right side
   12,957,536x = 404,630,282,699,776
5. Step 5: Solve for x
   x = 404,630,282,699,776/12,957,536
6. Step 6: Final answer
   x = 31,227,409.49