Finding the Fourth Proportional to 1,401.79, 1,934.04 and 842.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.79 : 1,934.04 = 842.39 : x
2. Step 2: Convert to fraction form
   1,401.79/1,934.04 = 842.39/x
3. Step 3: Cross multiply
   1,401.79x = 1,934.04 × 842.39
4. Step 4: Simplify right side
   1,401.79x = 1,629,209.01
5. Step 5: Solve for x
   x = 1,629,209.01/1,401.79
6. Step 6: Final answer
   x = 1,162.23