Finding the Third Proportional to 5,115 and 10,931

Step by Step Solution

1. Step 1: Write the proportion equation
   5,115 : 10,931 = 10,931 : x
2. Step 2: Convert to fraction form
   5,115/10,931 = 10,931/x
3. Step 3: Cross multiply
   5,115x = 10,931 × 10,931
4. Step 4: Simplify right side
   5,115x = 119,486,761
5. Step 5: Solve for x
   x = 119,486,761/5,115
6. Step 6: Final answer
   x = 23,360.07