Finding the Third Proportional to 12,831 and 28,113

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831 : 28,113 = 28,113 : x
2. Step 2: Convert to fraction form
   12,831/28,113 = 28,113/x
3. Step 3: Cross multiply
   12,831x = 28,113 × 28,113
4. Step 4: Simplify right side
   12,831x = 790,340,769
5. Step 5: Solve for x
   x = 790,340,769/12,831
6. Step 6: Final answer
   x = 61,596.19