Finding the Third Proportional to 8,269.17 and 12,479.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,269.17 : 12,479.91 = 12,479.91 : x
2. Step 2: Convert to fraction form
   8,269.17/12,479.91 = 12,479.91/x
3. Step 3: Cross multiply
   8,269.17x = 12,479.91 × 12,479.91
4. Step 4: Simplify right side
   8,269.17x = 155,748,060.01
5. Step 5: Solve for x
   x = 155,748,060.01/8,269.17
6. Step 6: Final answer
   x = 18,834.78