Finding the Fourth Proportional to 2,231.55, 3,347.37 and 1,061.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.55 : 3,347.37 = 1,061.28 : x
2. Step 2: Convert to fraction form
   2,231.55/3,347.37 = 1,061.28/x
3. Step 3: Cross multiply
   2,231.55x = 3,347.37 × 1,061.28
4. Step 4: Simplify right side
   2,231.55x = 3,552,496.83
5. Step 5: Solve for x
   x = 3,552,496.83/2,231.55
6. Step 6: Final answer
   x = 1,591.94