Finding the Fourth Proportional to 12,661.25, 17,472.51 and 7,072.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.25 : 17,472.51 = 7,072.25 : x
2. Step 2: Convert to fraction form
   12,661.25/17,472.51 = 7,072.25/x
3. Step 3: Cross multiply
   12,661.25x = 17,472.51 × 7,072.25
4. Step 4: Simplify right side
   12,661.25x = 123,569,871.48
5. Step 5: Solve for x
   x = 123,569,871.48/12,661.25
6. Step 6: Final answer
   x = 9,759.69