Finding the Third Proportional to 243,328 and 325,484

Step by Step Solution

1. Step 1: Write the proportion equation
   243,328 : 325,484 = 325,484 : x
2. Step 2: Convert to fraction form
   243,328/325,484 = 325,484/x
3. Step 3: Cross multiply
   243,328x = 325,484 × 325,484
4. Step 4: Simplify right side
   243,328x = 105,939,834,256
5. Step 5: Solve for x
   x = 105,939,834,256/243,328
6. Step 6: Final answer
   x = 435,378.72