Finding the Fourth Proportional to 10,815.82, 16,174.31 and 7,864.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.82 : 16,174.31 = 7,864.18 : x
2. Step 2: Convert to fraction form
   10,815.82/16,174.31 = 7,864.18/x
3. Step 3: Cross multiply
   10,815.82x = 16,174.31 × 7,864.18
4. Step 4: Simplify right side
   10,815.82x = 127,197,685.22
5. Step 5: Solve for x
   x = 127,197,685.22/10,815.82
6. Step 6: Final answer
   x = 11,760.34