Finding the Third Proportional to 5,418.19 and 8,105.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,418.19 : 8,105.34 = 8,105.34 : x
2. Step 2: Convert to fraction form
   5,418.19/8,105.34 = 8,105.34/x
3. Step 3: Cross multiply
   5,418.19x = 8,105.34 × 8,105.34
4. Step 4: Simplify right side
   5,418.19x = 65,696,597.31
5. Step 5: Solve for x
   x = 65,696,597.31/5,418.19
6. Step 6: Final answer
   x = 12,125.20