Finding the Third Proportional to 12,921 and 28,461

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921 : 28,461 = 28,461 : x
2. Step 2: Convert to fraction form
   12,921/28,461 = 28,461/x
3. Step 3: Cross multiply
   12,921x = 28,461 × 28,461
4. Step 4: Simplify right side
   12,921x = 810,028,521
5. Step 5: Solve for x
   x = 810,028,521/12,921
6. Step 6: Final answer
   x = 62,690.85