Finding the Third Proportional to 30,608 and 64,891

Step by Step Solution

1. Step 1: Write the proportion equation
   30,608 : 64,891 = 64,891 : x
2. Step 2: Convert to fraction form
   30,608/64,891 = 64,891/x
3. Step 3: Cross multiply
   30,608x = 64,891 × 64,891
4. Step 4: Simplify right side
   30,608x = 4,210,841,881
5. Step 5: Solve for x
   x = 4,210,841,881/30,608
6. Step 6: Final answer
   x = 137,573.24