Finding the Fourth Proportional to 1,155.56, 1,596.28 and 1,031.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.56 : 1,596.28 = 1,031.18 : x
2. Step 2: Convert to fraction form
   1,155.56/1,596.28 = 1,031.18/x
3. Step 3: Cross multiply
   1,155.56x = 1,596.28 × 1,031.18
4. Step 4: Simplify right side
   1,155.56x = 1,646,052.01
5. Step 5: Solve for x
   x = 1,646,052.01/1,155.56
6. Step 6: Final answer
   x = 1,424.46