Finding the Third Proportional to 30,225 and 64,910

Step by Step Solution

1. Step 1: Write the proportion equation
   30,225 : 64,910 = 64,910 : x
2. Step 2: Convert to fraction form
   30,225/64,910 = 64,910/x
3. Step 3: Cross multiply
   30,225x = 64,910 × 64,910
4. Step 4: Simplify right side
   30,225x = 4,213,308,100
5. Step 5: Solve for x
   x = 4,213,308,100/30,225
6. Step 6: Final answer
   x = 139,398.12