Finding the Third Proportional to 12,780 and 28,019

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780 : 28,019 = 28,019 : x
2. Step 2: Convert to fraction form
   12,780/28,019 = 28,019/x
3. Step 3: Cross multiply
   12,780x = 28,019 × 28,019
4. Step 4: Simplify right side
   12,780x = 785,064,361
5. Step 5: Solve for x
   x = 785,064,361/12,780
6. Step 6: Final answer
   x = 61,429.14