Finding the Fourth Proportional to 12,438.27, 17,166.06 and 7,134.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,438.27 : 17,166.06 = 7,134.75 : x
2. Step 2: Convert to fraction form
   12,438.27/17,166.06 = 7,134.75/x
3. Step 3: Cross multiply
   12,438.27x = 17,166.06 × 7,134.75
4. Step 4: Simplify right side
   12,438.27x = 122,475,546.59
5. Step 5: Solve for x
   x = 122,475,546.59/12,438.27
6. Step 6: Final answer
   x = 9,846.67