Finding the Fourth Proportional to 20,308.86, 30,464.18 and 7,161.34

Step by Step Solution

1. Step 1: Write the proportion equation
   20,308.86 : 30,464.18 = 7,161.34 : x
2. Step 2: Convert to fraction form
   20,308.86/30,464.18 = 7,161.34/x
3. Step 3: Cross multiply
   20,308.86x = 30,464.18 × 7,161.34
4. Step 4: Simplify right side
   20,308.86x = 218,164,350.80
5. Step 5: Solve for x
   x = 218,164,350.80/20,308.86
6. Step 6: Final answer
   x = 10,742.32