Finding the Fourth Proportional to 2,128.32, 3,190.22 and 1,031.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.32 : 3,190.22 = 1,031.18 : x
2. Step 2: Convert to fraction form
   2,128.32/3,190.22 = 1,031.18/x
3. Step 3: Cross multiply
   2,128.32x = 3,190.22 × 1,031.18
4. Step 4: Simplify right side
   2,128.32x = 3,289,691.06
5. Step 5: Solve for x
   x = 3,289,691.06/2,128.32
6. Step 6: Final answer
   x = 1,545.68