Finding the Fourth Proportional to 2,588.16, 3,882.72 and 1,288.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,588.16 : 3,882.72 = 1,288.88 : x
2. Step 2: Convert to fraction form
   2,588.16/3,882.72 = 1,288.88/x
3. Step 3: Cross multiply
   2,588.16x = 3,882.72 × 1,288.88
4. Step 4: Simplify right side
   2,588.16x = 5,004,360.15
5. Step 5: Solve for x
   x = 5,004,360.15/2,588.16
6. Step 6: Final answer
   x = 1,933.56