Finding the Third Proportional to 210,848 and 308,818

Step by Step Solution

1. Step 1: Write the proportion equation
   210,848 : 308,818 = 308,818 : x
2. Step 2: Convert to fraction form
   210,848/308,818 = 308,818/x
3. Step 3: Cross multiply
   210,848x = 308,818 × 308,818
4. Step 4: Simplify right side
   210,848x = 95,368,557,124
5. Step 5: Solve for x
   x = 95,368,557,124/210,848
6. Step 6: Final answer
   x = 452,309.52