Finding the Fourth Proportional to 20,103.19, 30,156.23 and 5,311.96

Step by Step Solution

1. Step 1: Write the proportion equation
   20,103.19 : 30,156.23 = 5,311.96 : x
2. Step 2: Convert to fraction form
   20,103.19/30,156.23 = 5,311.96/x
3. Step 3: Cross multiply
   20,103.19x = 30,156.23 × 5,311.96
4. Step 4: Simplify right side
   20,103.19x = 160,188,687.51
5. Step 5: Solve for x
   x = 160,188,687.51/20,103.19
6. Step 6: Final answer
   x = 7,968.32