Finding the Third Proportional to 7,902 and 12,945

Step by Step Solution

1. Step 1: Write the proportion equation
   7,902 : 12,945 = 12,945 : x
2. Step 2: Convert to fraction form
   7,902/12,945 = 12,945/x
3. Step 3: Cross multiply
   7,902x = 12,945 × 12,945
4. Step 4: Simplify right side
   7,902x = 167,573,025
5. Step 5: Solve for x
   x = 167,573,025/7,902
6. Step 6: Final answer
   x = 21,206.41