Finding the Fourth Proportional to 1,401.92, 1,934.21 and 842.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.92 : 1,934.21 = 842.51 : x
2. Step 2: Convert to fraction form
   1,401.92/1,934.21 = 842.51/x
3. Step 3: Cross multiply
   1,401.92x = 1,934.21 × 842.51
4. Step 4: Simplify right side
   1,401.92x = 1,629,591.27
5. Step 5: Solve for x
   x = 1,629,591.27/1,401.92
6. Step 6: Final answer
   x = 1,162.40