Finding the Third Proportional to 131,573 and 289,390

Step by Step Solution

1. Step 1: Write the proportion equation
   131,573 : 289,390 = 289,390 : x
2. Step 2: Convert to fraction form
   131,573/289,390 = 289,390/x
3. Step 3: Cross multiply
   131,573x = 289,390 × 289,390
4. Step 4: Simplify right side
   131,573x = 83,746,572,100
5. Step 5: Solve for x
   x = 83,746,572,100/131,573
6. Step 6: Final answer
   x = 636,502.72