Finding the Third Proportional to 199,318 and 298,428

Step by Step Solution

1. Step 1: Write the proportion equation
   199,318 : 298,428 = 298,428 : x
2. Step 2: Convert to fraction form
   199,318/298,428 = 298,428/x
3. Step 3: Cross multiply
   199,318x = 298,428 × 298,428
4. Step 4: Simplify right side
   199,318x = 89,059,271,184
5. Step 5: Solve for x
   x = 89,059,271,184/199,318
6. Step 6: Final answer
   x = 446,820.01