Finding the Fourth Proportional to 10,821.40, 14,929.31 and 7,286.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,821.40 : 14,929.31 = 7,286.96 : x
2. Step 2: Convert to fraction form
   10,821.40/14,929.31 = 7,286.96/x
3. Step 3: Cross multiply
   10,821.40x = 14,929.31 × 7,286.96
4. Step 4: Simplify right side
   10,821.40x = 108,789,340.34
5. Step 5: Solve for x
   x = 108,789,340.34/10,821.40
6. Step 6: Final answer
   x = 10,053.17