Finding the Fourth Proportional to 3,578.50, 5,367.82 and 981.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.50 : 5,367.82 = 981.51 : x
2. Step 2: Convert to fraction form
   3,578.50/5,367.82 = 981.51/x
3. Step 3: Cross multiply
   3,578.50x = 5,367.82 × 981.51
4. Step 4: Simplify right side
   3,578.50x = 5,268,569.01
5. Step 5: Solve for x
   x = 5,268,569.01/3,578.50
6. Step 6: Final answer
   x = 1,472.28