Finding the Fourth Proportional to 21,212.69, 31,806.83 and 8,741.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,212.69 : 31,806.83 = 8,741.32 : x
2. Step 2: Convert to fraction form
   21,212.69/31,806.83 = 8,741.32/x
3. Step 3: Cross multiply
   21,212.69x = 31,806.83 × 8,741.32
4. Step 4: Simplify right side
   21,212.69x = 278,033,621.55
5. Step 5: Solve for x
   x = 278,033,621.55/21,212.69
6. Step 6: Final answer
   x = 13,106.95