Finding the Fourth Proportional to 1,705.31, 2,353.40 and 959.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,705.31 : 2,353.40 = 959.30 : x
2. Step 2: Convert to fraction form
   1,705.31/2,353.40 = 959.30/x
3. Step 3: Cross multiply
   1,705.31x = 2,353.40 × 959.30
4. Step 4: Simplify right side
   1,705.31x = 2,257,611.82
5. Step 5: Solve for x
   x = 2,257,611.82/1,705.31
6. Step 6: Final answer
   x = 1,323.87