Finding the Third Proportional to 217,667.25 and 336,339

Step by Step Solution

1. Step 1: Write the proportion equation
   217,667.25 : 336,339 = 336,339 : x
2. Step 2: Convert to fraction form
   217,667.25/336,339 = 336,339/x
3. Step 3: Cross multiply
   217,667.25x = 336,339 × 336,339
4. Step 4: Simplify right side
   217,667.25x = 113,123,922,921
5. Step 5: Solve for x
   x = 113,123,922,921/217,667.25
6. Step 6: Final answer
   x = 519,710.35