Finding the Fourth Proportional to 1,151.09, 1,588.52 and 685.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.09 : 1,588.52 = 685.25 : x
2. Step 2: Convert to fraction form
   1,151.09/1,588.52 = 685.25/x
3. Step 3: Cross multiply
   1,151.09x = 1,588.52 × 685.25
4. Step 4: Simplify right side
   1,151.09x = 1,088,533.33
5. Step 5: Solve for x
   x = 1,088,533.33/1,151.09
6. Step 6: Final answer
   x = 945.65