Finding the Fourth Proportional to 1,447.31, 2,171.57 and 927.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.31 : 2,171.57 = 927.59 : x
2. Step 2: Convert to fraction form
   1,447.31/2,171.57 = 927.59/x
3. Step 3: Cross multiply
   1,447.31x = 2,171.57 × 927.59
4. Step 4: Simplify right side
   1,447.31x = 2,014,335.97
5. Step 5: Solve for x
   x = 2,014,335.97/1,447.31
6. Step 6: Final answer
   x = 1,391.78