Finding the Third Proportional to 210,656 and 333,520

Step by Step Solution

1. Step 1: Write the proportion equation
   210,656 : 333,520 = 333,520 : x
2. Step 2: Convert to fraction form
   210,656/333,520 = 333,520/x
3. Step 3: Cross multiply
   210,656x = 333,520 × 333,520
4. Step 4: Simplify right side
   210,656x = 111,235,590,400
5. Step 5: Solve for x
   x = 111,235,590,400/210,656
6. Step 6: Final answer
   x = 528,043.78