Finding the Third Proportional to 8,910.84 and 12,457.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,910.84 : 12,457.69 = 12,457.69 : x
2. Step 2: Convert to fraction form
   8,910.84/12,457.69 = 12,457.69/x
3. Step 3: Cross multiply
   8,910.84x = 12,457.69 × 12,457.69
4. Step 4: Simplify right side
   8,910.84x = 155,193,977.85
5. Step 5: Solve for x
   x = 155,193,977.85/8,910.84
6. Step 6: Final answer
   x = 17,416.31