Finding the Third Proportional to 8,129,136 and 12,474,792

Step by Step Solution

1. Step 1: Write the proportion equation
   8,129,136 : 12,474,792 = 12,474,792 : x
2. Step 2: Convert to fraction form
   8,129,136/12,474,792 = 12,474,792/x
3. Step 3: Cross multiply
   8,129,136x = 12,474,792 × 12,474,792
4. Step 4: Simplify right side
   8,129,136x = 155,620,435,443,264
5. Step 5: Solve for x
   x = 155,620,435,443,264/8,129,136
6. Step 6: Final answer
   x = 19,143,539.42