Finding the Fourth Proportional to 10,321.05, 14,228.10 and 7,628.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,321.05 : 14,228.10 = 7,628.31 : x
2. Step 2: Convert to fraction form
   10,321.05/14,228.10 = 7,628.31/x
3. Step 3: Cross multiply
   10,321.05x = 14,228.10 × 7,628.31
4. Step 4: Simplify right side
   10,321.05x = 108,536,357.51
5. Step 5: Solve for x
   x = 108,536,357.51/10,321.05
6. Step 6: Final answer
   x = 10,516.02