Finding the Fourth Proportional to 10,067.60, 13,891.81 and 5,591.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,067.60 : 13,891.81 = 5,591.39 : x
2. Step 2: Convert to fraction form
   10,067.60/13,891.81 = 5,591.39/x
3. Step 3: Cross multiply
   10,067.60x = 13,891.81 × 5,591.39
4. Step 4: Simplify right side
   10,067.60x = 77,674,527.52
5. Step 5: Solve for x
   x = 77,674,527.52/10,067.60
6. Step 6: Final answer
   x = 7,715.30