Finding the Third Proportional to 7,515 and 12,818

Step by Step Solution

1. Step 1: Write the proportion equation
   7,515 : 12,818 = 12,818 : x
2. Step 2: Convert to fraction form
   7,515/12,818 = 12,818/x
3. Step 3: Cross multiply
   7,515x = 12,818 × 12,818
4. Step 4: Simplify right side
   7,515x = 164,301,124
5. Step 5: Solve for x
   x = 164,301,124/7,515
6. Step 6: Final answer
   x = 21,863.09