Finding the Third Proportional to 8,181.56 and 12,510.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,181.56 : 12,510.28 = 12,510.28 : x
2. Step 2: Convert to fraction form
   8,181.56/12,510.28 = 12,510.28/x
3. Step 3: Cross multiply
   8,181.56x = 12,510.28 × 12,510.28
4. Step 4: Simplify right side
   8,181.56x = 156,507,136.95
5. Step 5: Solve for x
   x = 156,507,136.95/8,181.56
6. Step 6: Final answer
   x = 19,129.25