Finding the Third Proportional to 10,308 and 18,120

Step by Step Solution

1. Step 1: Write the proportion equation
   10,308 : 18,120 = 18,120 : x
2. Step 2: Convert to fraction form
   10,308/18,120 = 18,120/x
3. Step 3: Cross multiply
   10,308x = 18,120 × 18,120
4. Step 4: Simplify right side
   10,308x = 328,334,400
5. Step 5: Solve for x
   x = 328,334,400/10,308
6. Step 6: Final answer
   x = 31,852.39