Finding the Third Proportional to 12,991 and 28,630

Step by Step Solution

1. Step 1: Write the proportion equation
   12,991 : 28,630 = 28,630 : x
2. Step 2: Convert to fraction form
   12,991/28,630 = 28,630/x
3. Step 3: Cross multiply
   12,991x = 28,630 × 28,630
4. Step 4: Simplify right side
   12,991x = 819,676,900
5. Step 5: Solve for x
   x = 819,676,900/12,991
6. Step 6: Final answer
   x = 63,095.75