Finding the Third Proportional to 208,857 and 336,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   208,857 : 336,289.50 = 336,289.50 : x
2. Step 2: Convert to fraction form
   208,857/336,289.50 = 336,289.50/x
3. Step 3: Cross multiply
   208,857x = 336,289.50 × 336,289.50
4. Step 4: Simplify right side
   208,857x = 113,090,627,810.25
5. Step 5: Solve for x
   x = 113,090,627,810.25/208,857
6. Step 6: Final answer
   x = 541,473.96