Finding the Third Proportional to 2,356 and 5,139

Step by Step Solution

1. Step 1: Write the proportion equation
   2,356 : 5,139 = 5,139 : x
2. Step 2: Convert to fraction form
   2,356/5,139 = 5,139/x
3. Step 3: Cross multiply
   2,356x = 5,139 × 5,139
4. Step 4: Simplify right side
   2,356x = 26,409,321
5. Step 5: Solve for x
   x = 26,409,321/2,356
6. Step 6: Final answer
   x = 11,209.39