Finding the Third Proportional to 217,063.50 and 335,436

Step by Step Solution

1. Step 1: Write the proportion equation
   217,063.50 : 335,436 = 335,436 : x
2. Step 2: Convert to fraction form
   217,063.50/335,436 = 335,436/x
3. Step 3: Cross multiply
   217,063.50x = 335,436 × 335,436
4. Step 4: Simplify right side
   217,063.50x = 112,517,310,096
5. Step 5: Solve for x
   x = 112,517,310,096/217,063.50
6. Step 6: Final answer
   x = 518,361.26