Finding the Fourth Proportional to 12,771.28, 19,164.32 and 5,375.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,771.28 : 19,164.32 = 5,375.12 : x
2. Step 2: Convert to fraction form
   12,771.28/19,164.32 = 5,375.12/x
3. Step 3: Cross multiply
   12,771.28x = 19,164.32 × 5,375.12
4. Step 4: Simplify right side
   12,771.28x = 103,010,519.72
5. Step 5: Solve for x
   x = 103,010,519.72/12,771.28
6. Step 6: Final answer
   x = 8,065.79