Finding the Third Proportional to 217,650 and 336,300

Step by Step Solution

1. Step 1: Write the proportion equation
   217,650 : 336,300 = 336,300 : x
2. Step 2: Convert to fraction form
   217,650/336,300 = 336,300/x
3. Step 3: Cross multiply
   217,650x = 336,300 × 336,300
4. Step 4: Simplify right side
   217,650x = 113,097,690,000
5. Step 5: Solve for x
   x = 113,097,690,000/217,650
6. Step 6: Final answer
   x = 519,631.01