Finding the Third Proportional to 30,519.28 and 65,640.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,519.28 : 65,640.38 = 65,640.38 : x
2. Step 2: Convert to fraction form
   30,519.28/65,640.38 = 65,640.38/x
3. Step 3: Cross multiply
   30,519.28x = 65,640.38 × 65,640.38
4. Step 4: Simplify right side
   30,519.28x = 4,308,658,830.14
5. Step 5: Solve for x
   x = 4,308,658,830.14/30,519.28
6. Step 6: Final answer
   x = 141,178.25