Finding the Fourth Proportional to 12,427.16, 17,143.70 and 7,388.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.16 : 17,143.70 = 7,388.55 : x
2. Step 2: Convert to fraction form
   12,427.16/17,143.70 = 7,388.55/x
3. Step 3: Cross multiply
   12,427.16x = 17,143.70 × 7,388.55
4. Step 4: Simplify right side
   12,427.16x = 126,667,047.69
5. Step 5: Solve for x
   x = 126,667,047.69/12,427.16
6. Step 6: Final answer
   x = 10,192.76