Finding the Third Proportional to 161,718.75 and 333,810

Step by Step Solution

1. Step 1: Write the proportion equation
   161,718.75 : 333,810 = 333,810 : x
2. Step 2: Convert to fraction form
   161,718.75/333,810 = 333,810/x
3. Step 3: Cross multiply
   161,718.75x = 333,810 × 333,810
4. Step 4: Simplify right side
   161,718.75x = 111,429,116,100
5. Step 5: Solve for x
   x = 111,429,116,100/161,718.75
6. Step 6: Final answer
   x = 689,030.28