Finding the Third Proportional to 8,436 and 12,347.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,436 : 12,347.25 = 12,347.25 : x
2. Step 2: Convert to fraction form
   8,436/12,347.25 = 12,347.25/x
3. Step 3: Cross multiply
   8,436x = 12,347.25 × 12,347.25
4. Step 4: Simplify right side
   8,436x = 152,454,582.56
5. Step 5: Solve for x
   x = 152,454,582.56/8,436
6. Step 6: Final answer
   x = 18,071.90