Finding the Fourth Proportional to 12,357.18, 18,530.01 and 7,164.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,357.18 : 18,530.01 = 7,164.54 : x
2. Step 2: Convert to fraction form
   12,357.18/18,530.01 = 7,164.54/x
3. Step 3: Cross multiply
   12,357.18x = 18,530.01 × 7,164.54
4. Step 4: Simplify right side
   12,357.18x = 132,758,997.85
5. Step 5: Solve for x
   x = 132,758,997.85/12,357.18
6. Step 6: Final answer
   x = 10,743.47