Finding the Third Proportional to 8,411.34 and 12,457.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.34 : 12,457.55 = 12,457.55 : x
2. Step 2: Convert to fraction form
   8,411.34/12,457.55 = 12,457.55/x
3. Step 3: Cross multiply
   8,411.34x = 12,457.55 × 12,457.55
4. Step 4: Simplify right side
   8,411.34x = 155,190,474.14
5. Step 5: Solve for x
   x = 155,190,474.14/8,411.34
6. Step 6: Final answer
   x = 18,450.14