Finding the Third Proportional to 30,640.78 and 67,295.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,640.78 : 67,295.81 = 67,295.81 : x
2. Step 2: Convert to fraction form
   30,640.78/67,295.81 = 67,295.81/x
3. Step 3: Cross multiply
   30,640.78x = 67,295.81 × 67,295.81
4. Step 4: Simplify right side
   30,640.78x = 4,528,726,380.04
5. Step 5: Solve for x
   x = 4,528,726,380.04/30,640.78
6. Step 6: Final answer
   x = 147,800.62