Finding the Fourth Proportional to 9,910.68, 13,678.48 and 7,528.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.68 : 13,678.48 = 7,528.54 : x
2. Step 2: Convert to fraction form
   9,910.68/13,678.48 = 7,528.54/x
3. Step 3: Cross multiply
   9,910.68x = 13,678.48 × 7,528.54
4. Step 4: Simplify right side
   9,910.68x = 102,978,983.82
5. Step 5: Solve for x
   x = 102,978,983.82/9,910.68
6. Step 6: Final answer
   x = 10,390.71