Finding the Third Proportional to 17,680 and 40,870

Step by Step Solution

1. Step 1: Write the proportion equation
   17,680 : 40,870 = 40,870 : x
2. Step 2: Convert to fraction form
   17,680/40,870 = 40,870/x
3. Step 3: Cross multiply
   17,680x = 40,870 × 40,870
4. Step 4: Simplify right side
   17,680x = 1,670,356,900
5. Step 5: Solve for x
   x = 1,670,356,900/17,680
6. Step 6: Final answer
   x = 94,477.20