Finding the Fourth Proportional to 9,910.49, 13,674.34 and 5,716.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.49 : 13,674.34 = 5,716.31 : x
2. Step 2: Convert to fraction form
   9,910.49/13,674.34 = 5,716.31/x
3. Step 3: Cross multiply
   9,910.49x = 13,674.34 × 5,716.31
4. Step 4: Simplify right side
   9,910.49x = 78,166,807.82
5. Step 5: Solve for x
   x = 78,166,807.82/9,910.49
6. Step 6: Final answer
   x = 7,887.28