Finding the Fourth Proportional to 2,128.77, 3,193.83 and 1,088.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.77 : 3,193.83 = 1,088.55 : x
2. Step 2: Convert to fraction form
   2,128.77/3,193.83 = 1,088.55/x
3. Step 3: Cross multiply
   2,128.77x = 3,193.83 × 1,088.55
4. Step 4: Simplify right side
   2,128.77x = 3,476,643.65
5. Step 5: Solve for x
   x = 3,476,643.65/2,128.77
6. Step 6: Final answer
   x = 1,633.17