Finding the Third Proportional to 30,116.25 and 64,857.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,116.25 : 64,857.38 = 64,857.38 : x
2. Step 2: Convert to fraction form
   30,116.25/64,857.38 = 64,857.38/x
3. Step 3: Cross multiply
   30,116.25x = 64,857.38 × 64,857.38
4. Step 4: Simplify right side
   30,116.25x = 4,206,479,091.89
5. Step 5: Solve for x
   x = 4,206,479,091.89/30,116.25
6. Step 6: Final answer
   x = 139,674.73