Finding the Third Proportional to 3,100.78 and 8,386.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.78 : 8,386.03 = 8,386.03 : x
2. Step 2: Convert to fraction form
   3,100.78/8,386.03 = 8,386.03/x
3. Step 3: Cross multiply
   3,100.78x = 8,386.03 × 8,386.03
4. Step 4: Simplify right side
   3,100.78x = 70,325,520.13
5. Step 5: Solve for x
   x = 70,325,520.13/3,100.78
6. Step 6: Final answer
   x = 22,679.94