Finding the Fourth Proportional to 12,453.31, 17,185.57 and 6,864.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,453.31 : 17,185.57 = 6,864.31 : x
2. Step 2: Convert to fraction form
   12,453.31/17,185.57 = 6,864.31/x
3. Step 3: Cross multiply
   12,453.31x = 17,185.57 × 6,864.31
4. Step 4: Simplify right side
   12,453.31x = 117,967,045.69
5. Step 5: Solve for x
   x = 117,967,045.69/12,453.31
6. Step 6: Final answer
   x = 9,472.75