Finding the Third Proportional to 210,384 and 308,536

Step by Step Solution

1. Step 1: Write the proportion equation
   210,384 : 308,536 = 308,536 : x
2. Step 2: Convert to fraction form
   210,384/308,536 = 308,536/x
3. Step 3: Cross multiply
   210,384x = 308,536 × 308,536
4. Step 4: Simplify right side
   210,384x = 95,194,463,296
5. Step 5: Solve for x
   x = 95,194,463,296/210,384
6. Step 6: Final answer
   x = 452,479.58