Finding the Fourth Proportional to 1,355.76, 1,871.80 and 958.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.76 : 1,871.80 = 958.46 : x
2. Step 2: Convert to fraction form
   1,355.76/1,871.80 = 958.46/x
3. Step 3: Cross multiply
   1,355.76x = 1,871.80 × 958.46
4. Step 4: Simplify right side
   1,355.76x = 1,794,045.43
5. Step 5: Solve for x
   x = 1,794,045.43/1,355.76
6. Step 6: Final answer
   x = 1,323.28