Finding the Fourth Proportional to 1,392.18, 2,085.83 and 958.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.18 : 2,085.83 = 958.42 : x
2. Step 2: Convert to fraction form
   1,392.18/2,085.83 = 958.42/x
3. Step 3: Cross multiply
   1,392.18x = 2,085.83 × 958.42
4. Step 4: Simplify right side
   1,392.18x = 1,999,101.19
5. Step 5: Solve for x
   x = 1,999,101.19/1,392.18
6. Step 6: Final answer
   x = 1,435.95