Finding the Third Proportional to 206,915 and 443,358

Step by Step Solution

1. Step 1: Write the proportion equation
   206,915 : 443,358 = 443,358 : x
2. Step 2: Convert to fraction form
   206,915/443,358 = 443,358/x
3. Step 3: Cross multiply
   206,915x = 443,358 × 443,358
4. Step 4: Simplify right side
   206,915x = 196,566,316,164
5. Step 5: Solve for x
   x = 196,566,316,164/206,915
6. Step 6: Final answer
   x = 949,985.82