Finding the Fourth Proportional to 20,938.41, 31,395.32 and 8,458.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,938.41 : 31,395.32 = 8,458.83 : x
2. Step 2: Convert to fraction form
   20,938.41/31,395.32 = 8,458.83/x
3. Step 3: Cross multiply
   20,938.41x = 31,395.32 × 8,458.83
4. Step 4: Simplify right side
   20,938.41x = 265,567,632.38
5. Step 5: Solve for x
   x = 265,567,632.38/20,938.41
6. Step 6: Final answer
   x = 12,683.28