Finding the Fourth Proportional to 20,196.12, 30,289.63 and 7,711.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,196.12 : 30,289.63 = 7,711.69 : x
2. Step 2: Convert to fraction form
   20,196.12/30,289.63 = 7,711.69/x
3. Step 3: Cross multiply
   20,196.12x = 30,289.63 × 7,711.69
4. Step 4: Simplify right side
   20,196.12x = 233,584,236.77
5. Step 5: Solve for x
   x = 233,584,236.77/20,196.12
6. Step 6: Final answer
   x = 11,565.80