Finding the Fourth Proportional to 1,367.20, 1,886.20 and 842.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.20 : 1,886.20 = 842.32 : x
2. Step 2: Convert to fraction form
   1,367.20/1,886.20 = 842.32/x
3. Step 3: Cross multiply
   1,367.20x = 1,886.20 × 842.32
4. Step 4: Simplify right side
   1,367.20x = 1,588,783.98
5. Step 5: Solve for x
   x = 1,588,783.98/1,367.20
6. Step 6: Final answer
   x = 1,162.07