Finding the Third Proportional to 217,569 and 336,235.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,569 : 336,235.50 = 336,235.50 : x
2. Step 2: Convert to fraction form
   217,569/336,235.50 = 336,235.50/x
3. Step 3: Cross multiply
   217,569x = 336,235.50 × 336,235.50
4. Step 4: Simplify right side
   217,569x = 113,054,311,460.25
5. Step 5: Solve for x
   x = 113,054,311,460.25/217,569
6. Step 6: Final answer
   x = 519,625.09