Finding the Third Proportional to 9,920 and 13,476

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920 : 13,476 = 13,476 : x
2. Step 2: Convert to fraction form
   9,920/13,476 = 13,476/x
3. Step 3: Cross multiply
   9,920x = 13,476 × 13,476
4. Step 4: Simplify right side
   9,920x = 181,602,576
5. Step 5: Solve for x
   x = 181,602,576/9,920
6. Step 6: Final answer
   x = 18,306.71