Finding the Third Proportional to 8,310 and 12,436.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,310 : 12,436.88 = 12,436.88 : x
2. Step 2: Convert to fraction form
   8,310/12,436.88 = 12,436.88/x
3. Step 3: Cross multiply
   8,310x = 12,436.88 × 12,436.88
4. Step 4: Simplify right side
   8,310x = 154,675,859.77
5. Step 5: Solve for x
   x = 154,675,859.77/8,310
6. Step 6: Final answer
   x = 18,613.22