Finding the Third Proportional to 7,513 and 12,815

Step by Step Solution

1. Step 1: Write the proportion equation
   7,513 : 12,815 = 12,815 : x
2. Step 2: Convert to fraction form
   7,513/12,815 = 12,815/x
3. Step 3: Cross multiply
   7,513x = 12,815 × 12,815
4. Step 4: Simplify right side
   7,513x = 164,224,225
5. Step 5: Solve for x
   x = 164,224,225/7,513
6. Step 6: Final answer
   x = 21,858.67