Finding the Third Proportional to 252,308 and 298,390

Step by Step Solution

1. Step 1: Write the proportion equation
   252,308 : 298,390 = 298,390 : x
2. Step 2: Convert to fraction form
   252,308/298,390 = 298,390/x
3. Step 3: Cross multiply
   252,308x = 298,390 × 298,390
4. Step 4: Simplify right side
   252,308x = 89,036,592,100
5. Step 5: Solve for x
   x = 89,036,592,100/252,308
6. Step 6: Final answer
   x = 352,888.50