Finding the Fourth Proportional to 1,573.47, 2,171.39 and 865.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.47 : 2,171.39 = 865.33 : x
2. Step 2: Convert to fraction form
   1,573.47/2,171.39 = 865.33/x
3. Step 3: Cross multiply
   1,573.47x = 2,171.39 × 865.33
4. Step 4: Simplify right side
   1,573.47x = 1,878,958.05
5. Step 5: Solve for x
   x = 1,878,958.05/1,573.47
6. Step 6: Final answer
   x = 1,194.15