Finding the Fourth Proportional to 9,431.39, 14,145.56 and 3,191.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,431.39 : 14,145.56 = 3,191.28 : x
2. Step 2: Convert to fraction form
   9,431.39/14,145.56 = 3,191.28/x
3. Step 3: Cross multiply
   9,431.39x = 14,145.56 × 3,191.28
4. Step 4: Simplify right side
   9,431.39x = 45,142,426.76
5. Step 5: Solve for x
   x = 45,142,426.76/9,431.39
6. Step 6: Final answer
   x = 4,786.40