Finding the Fourth Proportional to 20,873.60, 31,314.32 and 8,394.57

Step by Step Solution

1. Step 1: Write the proportion equation
   20,873.60 : 31,314.32 = 8,394.57 : x
2. Step 2: Convert to fraction form
   20,873.60/31,314.32 = 8,394.57/x
3. Step 3: Cross multiply
   20,873.60x = 31,314.32 × 8,394.57
4. Step 4: Simplify right side
   20,873.60x = 262,870,209.27
5. Step 5: Solve for x
   x = 262,870,209.27/20,873.60
6. Step 6: Final answer
   x = 12,593.43