Finding the Fourth Proportional to 1,432.02, 1,976.21 and 842.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.02 : 1,976.21 = 842.89 : x
2. Step 2: Convert to fraction form
   1,432.02/1,976.21 = 842.89/x
3. Step 3: Cross multiply
   1,432.02x = 1,976.21 × 842.89
4. Step 4: Simplify right side
   1,432.02x = 1,665,727.65
5. Step 5: Solve for x
   x = 1,665,727.65/1,432.02
6. Step 6: Final answer
   x = 1,163.20