Finding the Fourth Proportional to 2,128.88, 3,191.03 and 1,030.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.88 : 3,191.03 = 1,030.82 : x
2. Step 2: Convert to fraction form
   2,128.88/3,191.03 = 1,030.82/x
3. Step 3: Cross multiply
   2,128.88x = 3,191.03 × 1,030.82
4. Step 4: Simplify right side
   2,128.88x = 3,289,377.54
5. Step 5: Solve for x
   x = 3,289,377.54/2,128.88
6. Step 6: Final answer
   x = 1,545.12