Finding the Third Proportional to 30,213 and 64,798

Step by Step Solution

1. Step 1: Write the proportion equation
   30,213 : 64,798 = 64,798 : x
2. Step 2: Convert to fraction form
   30,213/64,798 = 64,798/x
3. Step 3: Cross multiply
   30,213x = 64,798 × 64,798
4. Step 4: Simplify right side
   30,213x = 4,198,780,804
5. Step 5: Solve for x
   x = 4,198,780,804/30,213
6. Step 6: Final answer
   x = 138,972.65