Finding the Fourth Proportional to 1,436.43, 1,981.71 and 876.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.43 : 1,981.71 = 876.63 : x
2. Step 2: Convert to fraction form
   1,436.43/1,981.71 = 876.63/x
3. Step 3: Cross multiply
   1,436.43x = 1,981.71 × 876.63
4. Step 4: Simplify right side
   1,436.43x = 1,737,226.44
5. Step 5: Solve for x
   x = 1,737,226.44/1,436.43
6. Step 6: Final answer
   x = 1,209.41