Finding the Third Proportional to 7,710.75 and 12,258.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,710.75 : 12,258.56 = 12,258.56 : x
2. Step 2: Convert to fraction form
   7,710.75/12,258.56 = 12,258.56/x
3. Step 3: Cross multiply
   7,710.75x = 12,258.56 × 12,258.56
4. Step 4: Simplify right side
   7,710.75x = 150,272,354.57
5. Step 5: Solve for x
   x = 150,272,354.57/7,710.75
6. Step 6: Final answer
   x = 19,488.68