Finding the Fourth Proportional to 18,613.56, 27,920.33 and 5,475.15

Step by Step Solution

1. Step 1: Write the proportion equation
   18,613.56 : 27,920.33 = 5,475.15 : x
2. Step 2: Convert to fraction form
   18,613.56/27,920.33 = 5,475.15/x
3. Step 3: Cross multiply
   18,613.56x = 27,920.33 × 5,475.15
4. Step 4: Simplify right side
   18,613.56x = 152,867,967.42
5. Step 5: Solve for x
   x = 152,867,967.42/18,613.56
6. Step 6: Final answer
   x = 8,212.72