Finding the Fourth Proportional to 1,587.33, 2,190.54 and 957.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.33 : 2,190.54 = 957.86 : x
2. Step 2: Convert to fraction form
   1,587.33/2,190.54 = 957.86/x
3. Step 3: Cross multiply
   1,587.33x = 2,190.54 × 957.86
4. Step 4: Simplify right side
   1,587.33x = 2,098,231.50
5. Step 5: Solve for x
   x = 2,098,231.50/1,587.33
6. Step 6: Final answer
   x = 1,321.86