Finding the Third Proportional to 33,390 and 72,099

Step by Step Solution

1. Step 1: Write the proportion equation
   33,390 : 72,099 = 72,099 : x
2. Step 2: Convert to fraction form
   33,390/72,099 = 72,099/x
3. Step 3: Cross multiply
   33,390x = 72,099 × 72,099
4. Step 4: Simplify right side
   33,390x = 5,198,265,801
5. Step 5: Solve for x
   x = 5,198,265,801/33,390
6. Step 6: Final answer
   x = 155,683.31