Finding the Third Proportional to 7,521 and 10,215

Step by Step Solution

1. Step 1: Write the proportion equation
   7,521 : 10,215 = 10,215 : x
2. Step 2: Convert to fraction form
   7,521/10,215 = 10,215/x
3. Step 3: Cross multiply
   7,521x = 10,215 × 10,215
4. Step 4: Simplify right side
   7,521x = 104,346,225
5. Step 5: Solve for x
   x = 104,346,225/7,521
6. Step 6: Final answer
   x = 13,873.98