Finding the Third Proportional to 8,374,136 and 18,139,454

Step by Step Solution

1. Step 1: Write the proportion equation
   8,374,136 : 18,139,454 = 18,139,454 : x
2. Step 2: Convert to fraction form
   8,374,136/18,139,454 = 18,139,454/x
3. Step 3: Cross multiply
   8,374,136x = 18,139,454 × 18,139,454
4. Step 4: Simplify right side
   8,374,136x = 329,039,791,418,116
5. Step 5: Solve for x
   x = 329,039,791,418,116/8,374,136
6. Step 6: Final answer
   x = 39,292,386.87