Finding the Third Proportional to 298,939.50 and 453,945

Step by Step Solution

1. Step 1: Write the proportion equation
   298,939.50 : 453,945 = 453,945 : x
2. Step 2: Convert to fraction form
   298,939.50/453,945 = 453,945/x
3. Step 3: Cross multiply
   298,939.50x = 453,945 × 453,945
4. Step 4: Simplify right side
   298,939.50x = 206,066,063,025
5. Step 5: Solve for x
   x = 206,066,063,025/298,939.50
6. Step 6: Final answer
   x = 689,323.64