Finding the Third Proportional to 217,116 and 336,150

Step by Step Solution

1. Step 1: Write the proportion equation
   217,116 : 336,150 = 336,150 : x
2. Step 2: Convert to fraction form
   217,116/336,150 = 336,150/x
3. Step 3: Cross multiply
   217,116x = 336,150 × 336,150
4. Step 4: Simplify right side
   217,116x = 112,996,822,500
5. Step 5: Solve for x
   x = 112,996,822,500/217,116
6. Step 6: Final answer
   x = 520,444.47