Finding the Third Proportional to 22,978.69 and 30,640.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,978.69 : 30,640.78 = 30,640.78 : x
2. Step 2: Convert to fraction form
   22,978.69/30,640.78 = 30,640.78/x
3. Step 3: Cross multiply
   22,978.69x = 30,640.78 × 30,640.78
4. Step 4: Simplify right side
   22,978.69x = 938,857,475.61
5. Step 5: Solve for x
   x = 938,857,475.61/22,978.69
6. Step 6: Final answer
   x = 40,857.75