Finding the Third Proportional to 298,245 and 451,711.31

Step by Step Solution

1. Step 1: Write the proportion equation
   298,245 : 451,711.31 = 451,711.31 : x
2. Step 2: Convert to fraction form
   298,245/451,711.31 = 451,711.31/x
3. Step 3: Cross multiply
   298,245x = 451,711.31 × 451,711.31
4. Step 4: Simplify right side
   298,245x = 204,043,109,840.47
5. Step 5: Solve for x
   x = 204,043,109,840.47/298,245
6. Step 6: Final answer
   x = 684,145.95