Finding the Third Proportional to 199,320 and 298,431

Step by Step Solution

1. Step 1: Write the proportion equation
   199,320 : 298,431 = 298,431 : x
2. Step 2: Convert to fraction form
   199,320/298,431 = 298,431/x
3. Step 3: Cross multiply
   199,320x = 298,431 × 298,431
4. Step 4: Simplify right side
   199,320x = 89,061,061,761
5. Step 5: Solve for x
   x = 89,061,061,761/199,320
6. Step 6: Final answer
   x = 446,824.51