Finding the Third Proportional to 42,680 and 56,635

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680 : 56,635 = 56,635 : x
2. Step 2: Convert to fraction form
   42,680/56,635 = 56,635/x
3. Step 3: Cross multiply
   42,680x = 56,635 × 56,635
4. Step 4: Simplify right side
   42,680x = 3,207,523,225
5. Step 5: Solve for x
   x = 3,207,523,225/42,680
6. Step 6: Final answer
   x = 75,152.84