Finding the Third Proportional to 34,680 and 50,720

Step by Step Solution

1. Step 1: Write the proportion equation
   34,680 : 50,720 = 50,720 : x
2. Step 2: Convert to fraction form
   34,680/50,720 = 50,720/x
3. Step 3: Cross multiply
   34,680x = 50,720 × 50,720
4. Step 4: Simplify right side
   34,680x = 2,572,518,400
5. Step 5: Solve for x
   x = 2,572,518,400/34,680
6. Step 6: Final answer
   x = 74,178.73