Finding the Third Proportional to 30,908.25 and 66,189.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,908.25 : 66,189.38 = 66,189.38 : x
2. Step 2: Convert to fraction form
   30,908.25/66,189.38 = 66,189.38/x
3. Step 3: Cross multiply
   30,908.25x = 66,189.38 × 66,189.38
4. Step 4: Simplify right side
   30,908.25x = 4,381,033,362.89
5. Step 5: Solve for x
   x = 4,381,033,362.89/30,908.25
6. Step 6: Final answer
   x = 141,743.17