Finding the Third Proportional to 33,920 and 51,890

Step by Step Solution

1. Step 1: Write the proportion equation
   33,920 : 51,890 = 51,890 : x
2. Step 2: Convert to fraction form
   33,920/51,890 = 51,890/x
3. Step 3: Cross multiply
   33,920x = 51,890 × 51,890
4. Step 4: Simplify right side
   33,920x = 2,692,572,100
5. Step 5: Solve for x
   x = 2,692,572,100/33,920
6. Step 6: Final answer
   x = 79,380.07