Finding the Third Proportional to 12,686,580 and 19,327,290

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686,580 : 19,327,290 = 19,327,290 : x
2. Step 2: Convert to fraction form
   12,686,580/19,327,290 = 19,327,290/x
3. Step 3: Cross multiply
   12,686,580x = 19,327,290 × 19,327,290
4. Step 4: Simplify right side
   12,686,580x = 373,544,138,744,100
5. Step 5: Solve for x
   x = 373,544,138,744,100/12,686,580
6. Step 6: Final answer
   x = 29,444,037.62