Finding the Fourth Proportional to 12,418.72, 17,134.16 and 7,380.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,418.72 : 17,134.16 = 7,380.38 : x
2. Step 2: Convert to fraction form
   12,418.72/17,134.16 = 7,380.38/x
3. Step 3: Cross multiply
   12,418.72x = 17,134.16 × 7,380.38
4. Step 4: Simplify right side
   12,418.72x = 126,456,611.78
5. Step 5: Solve for x
   x = 126,456,611.78/12,418.72
6. Step 6: Final answer
   x = 10,182.74