Finding the Fourth Proportional to 1,587.09, 2,189.68 and 957.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.09 : 2,189.68 = 957.83 : x
2. Step 2: Convert to fraction form
   1,587.09/2,189.68 = 957.83/x
3. Step 3: Cross multiply
   1,587.09x = 2,189.68 × 957.83
4. Step 4: Simplify right side
   1,587.09x = 2,097,333.24
5. Step 5: Solve for x
   x = 2,097,333.24/1,587.09
6. Step 6: Final answer
   x = 1,321.49