Finding the Third Proportional to 8,690,136 and 13,147,052

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690,136 : 13,147,052 = 13,147,052 : x
2. Step 2: Convert to fraction form
   8,690,136/13,147,052 = 13,147,052/x
3. Step 3: Cross multiply
   8,690,136x = 13,147,052 × 13,147,052
4. Step 4: Simplify right side
   8,690,136x = 172,844,976,290,704
5. Step 5: Solve for x
   x = 172,844,976,290,704/8,690,136
6. Step 6: Final answer
   x = 19,889,789.56