Finding the Third Proportional to 28,180 and 42,378

Step by Step Solution

1. Step 1: Write the proportion equation
   28,180 : 42,378 = 42,378 : x
2. Step 2: Convert to fraction form
   28,180/42,378 = 42,378/x
3. Step 3: Cross multiply
   28,180x = 42,378 × 42,378
4. Step 4: Simplify right side
   28,180x = 1,795,894,884
5. Step 5: Solve for x
   x = 1,795,894,884/28,180
6. Step 6: Final answer
   x = 63,729.41