Finding the Third Proportional to 15,420 and 33,300

Step by Step Solution

1. Step 1: Write the proportion equation
   15,420 : 33,300 = 33,300 : x
2. Step 2: Convert to fraction form
   15,420/33,300 = 33,300/x
3. Step 3: Cross multiply
   15,420x = 33,300 × 33,300
4. Step 4: Simplify right side
   15,420x = 1,108,890,000
5. Step 5: Solve for x
   x = 1,108,890,000/15,420
6. Step 6: Final answer
   x = 71,912.45