Finding the Third Proportional to 12,436 and 15,810

Step by Step Solution

1. Step 1: Write the proportion equation
   12,436 : 15,810 = 15,810 : x
2. Step 2: Convert to fraction form
   12,436/15,810 = 15,810/x
3. Step 3: Cross multiply
   12,436x = 15,810 × 15,810
4. Step 4: Simplify right side
   12,436x = 249,956,100
5. Step 5: Solve for x
   x = 249,956,100/12,436
6. Step 6: Final answer
   x = 20,099.40