Finding the Fourth Proportional to 1,399.95, 1,932.80 and 958.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.95 : 1,932.80 = 958.77 : x
2. Step 2: Convert to fraction form
   1,399.95/1,932.80 = 958.77/x
3. Step 3: Cross multiply
   1,399.95x = 1,932.80 × 958.77
4. Step 4: Simplify right side
   1,399.95x = 1,853,105.86
5. Step 5: Solve for x
   x = 1,853,105.86/1,399.95
6. Step 6: Final answer
   x = 1,323.69