Finding the Third Proportional to 5,538,936 and 8,128,683

Step by Step Solution

1. Step 1: Write the proportion equation
   5,538,936 : 8,128,683 = 8,128,683 : x
2. Step 2: Convert to fraction form
   5,538,936/8,128,683 = 8,128,683/x
3. Step 3: Cross multiply
   5,538,936x = 8,128,683 × 8,128,683
4. Step 4: Simplify right side
   5,538,936x = 66,075,487,314,489
5. Step 5: Solve for x
   x = 66,075,487,314,489/5,538,936
6. Step 6: Final answer
   x = 11,929,274.38