Finding the Fourth Proportional to 9,131.28, 13,696.88 and 2,205.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.28 : 13,696.88 = 2,205.76 : x
2. Step 2: Convert to fraction form
   9,131.28/13,696.88 = 2,205.76/x
3. Step 3: Cross multiply
   9,131.28x = 13,696.88 × 2,205.76
4. Step 4: Simplify right side
   9,131.28x = 30,212,030.03
5. Step 5: Solve for x
   x = 30,212,030.03/9,131.28
6. Step 6: Final answer
   x = 3,308.63