Finding the Fourth Proportional to 1,432.27, 1,976.57 and 872.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.27 : 1,976.57 = 872.63 : x
2. Step 2: Convert to fraction form
   1,432.27/1,976.57 = 872.63/x
3. Step 3: Cross multiply
   1,432.27x = 1,976.57 × 872.63
4. Step 4: Simplify right side
   1,432.27x = 1,724,814.28
5. Step 5: Solve for x
   x = 1,724,814.28/1,432.27
6. Step 6: Final answer
   x = 1,204.25