Finding the Third Proportional to 30,989.25 and 67,817.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,989.25 : 67,817.25 = 67,817.25 : x
2. Step 2: Convert to fraction form
   30,989.25/67,817.25 = 67,817.25/x
3. Step 3: Cross multiply
   30,989.25x = 67,817.25 × 67,817.25
4. Step 4: Simplify right side
   30,989.25x = 4,599,179,397.56
5. Step 5: Solve for x
   x = 4,599,179,397.56/30,989.25
6. Step 6: Final answer
   x = 148,412.09