Finding the Third Proportional to 8,578,136 and 13,068,454

Step by Step Solution

1. Step 1: Write the proportion equation
   8,578,136 : 13,068,454 = 13,068,454 : x
2. Step 2: Convert to fraction form
   8,578,136/13,068,454 = 13,068,454/x
3. Step 3: Cross multiply
   8,578,136x = 13,068,454 × 13,068,454
4. Step 4: Simplify right side
   8,578,136x = 170,784,489,950,116
5. Step 5: Solve for x
   x = 170,784,489,950,116/8,578,136
6. Step 6: Final answer
   x = 19,909,277.49