Finding the Third Proportional to 291,492 and 443,286

Step by Step Solution

1. Step 1: Write the proportion equation
   291,492 : 443,286 = 443,286 : x
2. Step 2: Convert to fraction form
   291,492/443,286 = 443,286/x
3. Step 3: Cross multiply
   291,492x = 443,286 × 443,286
4. Step 4: Simplify right side
   291,492x = 196,502,477,796
5. Step 5: Solve for x
   x = 196,502,477,796/291,492
6. Step 6: Final answer
   x = 674,126.49