Finding the Fourth Proportional to 2,128.38, 3,193.11 and 1,087.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.38 : 3,193.11 = 1,087.98 : x
2. Step 2: Convert to fraction form
   2,128.38/3,193.11 = 1,087.98/x
3. Step 3: Cross multiply
   2,128.38x = 3,193.11 × 1,087.98
4. Step 4: Simplify right side
   2,128.38x = 3,474,039.82
5. Step 5: Solve for x
   x = 3,474,039.82/2,128.38
6. Step 6: Final answer
   x = 1,632.25