Finding the Fourth Proportional to 2,231.15, 3,342.17 and 1,057.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.15 : 3,342.17 = 1,057.59 : x
2. Step 2: Convert to fraction form
   2,231.15/3,342.17 = 1,057.59/x
3. Step 3: Cross multiply
   2,231.15x = 3,342.17 × 1,057.59
4. Step 4: Simplify right side
   2,231.15x = 3,534,645.57
5. Step 5: Solve for x
   x = 3,534,645.57/2,231.15
6. Step 6: Final answer
   x = 1,584.23