Finding the Fourth Proportional to 1,432.37, 1,976.30 and 842.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.37 : 1,976.30 = 842.79 : x
2. Step 2: Convert to fraction form
   1,432.37/1,976.30 = 842.79/x
3. Step 3: Cross multiply
   1,432.37x = 1,976.30 × 842.79
4. Step 4: Simplify right side
   1,432.37x = 1,665,601.66
5. Step 5: Solve for x
   x = 1,665,601.66/1,432.37
6. Step 6: Final answer
   x = 1,162.83