Finding the Third Proportional to 30,245.25 and 70,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,245.25 : 70,639.50 = 70,639.50 : x
2. Step 2: Convert to fraction form
   30,245.25/70,639.50 = 70,639.50/x
3. Step 3: Cross multiply
   30,245.25x = 70,639.50 × 70,639.50
4. Step 4: Simplify right side
   30,245.25x = 4,989,938,960.25
5. Step 5: Solve for x
   x = 4,989,938,960.25/30,245.25
6. Step 6: Final answer
   x = 164,982.57