Finding the Third Proportional to 4,890 and 10,691.25

Step by Step Solution

1. Step 1: Write the proportion equation
   4,890 : 10,691.25 = 10,691.25 : x
2. Step 2: Convert to fraction form
   4,890/10,691.25 = 10,691.25/x
3. Step 3: Cross multiply
   4,890x = 10,691.25 × 10,691.25
4. Step 4: Simplify right side
   4,890x = 114,302,826.56
5. Step 5: Solve for x
   x = 114,302,826.56/4,890
6. Step 6: Final answer
   x = 23,374.81