Finding the Fourth Proportional to 12,348.72, 18,530.37 and 7,418.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,348.72 : 18,530.37 = 7,418.86 : x
2. Step 2: Convert to fraction form
   12,348.72/18,530.37 = 7,418.86/x
3. Step 3: Cross multiply
   12,348.72x = 18,530.37 × 7,418.86
4. Step 4: Simplify right side
   12,348.72x = 137,474,174.45
5. Step 5: Solve for x
   x = 137,474,174.45/12,348.72
6. Step 6: Final answer
   x = 11,132.67