Finding the Fourth Proportional to 1,340.32, 1,849 and 842.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.32 : 1,849 = 842.72 : x
2. Step 2: Convert to fraction form
   1,340.32/1,849 = 842.72/x
3. Step 3: Cross multiply
   1,340.32x = 1,849 × 842.72
4. Step 4: Simplify right side
   1,340.32x = 1,558,189.28
5. Step 5: Solve for x
   x = 1,558,189.28/1,340.32
6. Step 6: Final answer
   x = 1,162.55