Finding the Fourth Proportional to 9,128.17, 13,694.69 and 2,888.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.17 : 13,694.69 = 2,888.30 : x
2. Step 2: Convert to fraction form
   9,128.17/13,694.69 = 2,888.30/x
3. Step 3: Cross multiply
   9,128.17x = 13,694.69 × 2,888.30
4. Step 4: Simplify right side
   9,128.17x = 39,554,358.69
5. Step 5: Solve for x
   x = 39,554,358.69/9,128.17
6. Step 6: Final answer
   x = 4,333.22