Finding the Fourth Proportional to 12,422.25, 17,148.42 and 7,709.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.25 : 17,148.42 = 7,709.31 : x
2. Step 2: Convert to fraction form
   12,422.25/17,148.42 = 7,709.31/x
3. Step 3: Cross multiply
   12,422.25x = 17,148.42 × 7,709.31
4. Step 4: Simplify right side
   12,422.25x = 132,202,485.79
5. Step 5: Solve for x
   x = 132,202,485.79/12,422.25
6. Step 6: Final answer
   x = 10,642.39