Finding the Fourth Proportional to 20,801.55, 31,162.84 and 12,350.22

Step by Step Solution

1. Step 1: Write the proportion equation
   20,801.55 : 31,162.84 = 12,350.22 : x
2. Step 2: Convert to fraction form
   20,801.55/31,162.84 = 12,350.22/x
3. Step 3: Cross multiply
   20,801.55x = 31,162.84 × 12,350.22
4. Step 4: Simplify right side
   20,801.55x = 384,867,929.82
5. Step 5: Solve for x
   x = 384,867,929.82/20,801.55
6. Step 6: Final answer
   x = 18,501.89