Finding the Fourth Proportional to 1,717.31, 2,369.89 and 931.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,717.31 : 2,369.89 = 931.37 : x
2. Step 2: Convert to fraction form
   1,717.31/2,369.89 = 931.37/x
3. Step 3: Cross multiply
   1,717.31x = 2,369.89 × 931.37
4. Step 4: Simplify right side
   1,717.31x = 2,207,233.76
5. Step 5: Solve for x
   x = 2,207,233.76/1,717.31
6. Step 6: Final answer
   x = 1,285.28