Finding the Third Proportional to 39,680 and 54,410

Step by Step Solution

1. Step 1: Write the proportion equation
   39,680 : 54,410 = 54,410 : x
2. Step 2: Convert to fraction form
   39,680/54,410 = 54,410/x
3. Step 3: Cross multiply
   39,680x = 54,410 × 54,410
4. Step 4: Simplify right side
   39,680x = 2,960,448,100
5. Step 5: Solve for x
   x = 2,960,448,100/39,680
6. Step 6: Final answer
   x = 74,608.07