Finding the Third Proportional to 30,928 and 67,869

Step by Step Solution

1. Step 1: Write the proportion equation
   30,928 : 67,869 = 67,869 : x
2. Step 2: Convert to fraction form
   30,928/67,869 = 67,869/x
3. Step 3: Cross multiply
   30,928x = 67,869 × 67,869
4. Step 4: Simplify right side
   30,928x = 4,606,201,161
5. Step 5: Solve for x
   x = 4,606,201,161/30,928
6. Step 6: Final answer
   x = 148,933.04