Finding the Fourth Proportional to 9,910.74, 13,674.69 and 5,716.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.74 : 13,674.69 = 5,716.56 : x
2. Step 2: Convert to fraction form
   9,910.74/13,674.69 = 5,716.56/x
3. Step 3: Cross multiply
   9,910.74x = 13,674.69 × 5,716.56
4. Step 4: Simplify right side
   9,910.74x = 78,172,185.87
5. Step 5: Solve for x
   x = 78,172,185.87/9,910.74
6. Step 6: Final answer
   x = 7,887.62