Finding the Third Proportional to 5,375.81 and 8,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,375.81 : 8,144.72 = 8,144.72 : x
2. Step 2: Convert to fraction form
   5,375.81/8,144.72 = 8,144.72/x
3. Step 3: Cross multiply
   5,375.81x = 8,144.72 × 8,144.72
4. Step 4: Simplify right side
   5,375.81x = 66,336,443.52
5. Step 5: Solve for x
   x = 66,336,443.52/5,375.81
6. Step 6: Final answer
   x = 12,339.80