Finding the Fourth Proportional to 1,586.52, 2,188.71 and 957.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,586.52 : 2,188.71 = 957.03 : x
2. Step 2: Convert to fraction form
   1,586.52/2,188.71 = 957.03/x
3. Step 3: Cross multiply
   1,586.52x = 2,188.71 × 957.03
4. Step 4: Simplify right side
   1,586.52x = 2,094,661.13
5. Step 5: Solve for x
   x = 2,094,661.13/1,586.52
6. Step 6: Final answer
   x = 1,320.29