Finding the Fourth Proportional to 9,131.68, 13,694.28 and 3,286.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.68 : 13,694.28 = 3,286.72 : x
2. Step 2: Convert to fraction form
   9,131.68/13,694.28 = 3,286.72/x
3. Step 3: Cross multiply
   9,131.68x = 13,694.28 × 3,286.72
4. Step 4: Simplify right side
   9,131.68x = 45,009,263.96
5. Step 5: Solve for x
   x = 45,009,263.96/9,131.68
6. Step 6: Final answer
   x = 4,928.91