Finding the Third Proportional to 12,910 and 28,278

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910 : 28,278 = 28,278 : x
2. Step 2: Convert to fraction form
   12,910/28,278 = 28,278/x
3. Step 3: Cross multiply
   12,910x = 28,278 × 28,278
4. Step 4: Simplify right side
   12,910x = 799,645,284
5. Step 5: Solve for x
   x = 799,645,284/12,910
6. Step 6: Final answer
   x = 61,939.99