Finding the Third Proportional to 30,648.25 and 66,134.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,648.25 : 66,134.69 = 66,134.69 : x
2. Step 2: Convert to fraction form
   30,648.25/66,134.69 = 66,134.69/x
3. Step 3: Cross multiply
   30,648.25x = 66,134.69 × 66,134.69
4. Step 4: Simplify right side
   30,648.25x = 4,373,796,890.72
5. Step 5: Solve for x
   x = 4,373,796,890.72/30,648.25
6. Step 6: Final answer
   x = 142,709.51