Finding the Fourth Proportional to 13,196.07, 19,798.76 and 8,771.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.07 : 19,798.76 = 8,771.31 : x
2. Step 2: Convert to fraction form
   13,196.07/19,798.76 = 8,771.31/x
3. Step 3: Cross multiply
   13,196.07x = 19,798.76 × 8,771.31
4. Step 4: Simplify right side
   13,196.07x = 173,661,061.58
5. Step 5: Solve for x
   x = 173,661,061.58/13,196.07
6. Step 6: Final answer
   x = 13,160.06