Finding the Third Proportional to 17,679.94 and 38,640.38

Step by Step Solution

1. Step 1: Write the proportion equation
   17,679.94 : 38,640.38 = 38,640.38 : x
2. Step 2: Convert to fraction form
   17,679.94/38,640.38 = 38,640.38/x
3. Step 3: Cross multiply
   17,679.94x = 38,640.38 × 38,640.38
4. Step 4: Simplify right side
   17,679.94x = 1,493,078,580.14
5. Step 5: Solve for x
   x = 1,493,078,580.14/17,679.94
6. Step 6: Final answer
   x = 84,450.44