Finding the Third Proportional to 2,390 and 5,308

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390 : 5,308 = 5,308 : x
2. Step 2: Convert to fraction form
   2,390/5,308 = 5,308/x
3. Step 3: Cross multiply
   2,390x = 5,308 × 5,308
4. Step 4: Simplify right side
   2,390x = 28,174,864
5. Step 5: Solve for x
   x = 28,174,864/2,390
6. Step 6: Final answer
   x = 11,788.65