Finding the Third Proportional to 30,216.75 and 64,809.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,216.75 : 64,809.75 = 64,809.75 : x
2. Step 2: Convert to fraction form
   30,216.75/64,809.75 = 64,809.75/x
3. Step 3: Cross multiply
   30,216.75x = 64,809.75 × 64,809.75
4. Step 4: Simplify right side
   30,216.75x = 4,200,303,695.06
5. Step 5: Solve for x
   x = 4,200,303,695.06/30,216.75
6. Step 6: Final answer
   x = 139,005.81