Finding the Fourth Proportional to 9,120.71, 13,681.67 and 3,196.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.71 : 13,681.67 = 3,196.91 : x
2. Step 2: Convert to fraction form
   9,120.71/13,681.67 = 3,196.91/x
3. Step 3: Cross multiply
   9,120.71x = 13,681.67 × 3,196.91
4. Step 4: Simplify right side
   9,120.71x = 43,739,067.64
5. Step 5: Solve for x
   x = 43,739,067.64/9,120.71
6. Step 6: Final answer
   x = 4,795.58