Finding the Fourth Proportional to 3,578.74, 5,367.52 and 981.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578.74 : 5,367.52 = 981.06 : x
2. Step 2: Convert to fraction form
   3,578.74/5,367.52 = 981.06/x
3. Step 3: Cross multiply
   3,578.74x = 5,367.52 × 981.06
4. Step 4: Simplify right side
   3,578.74x = 5,265,859.17
5. Step 5: Solve for x
   x = 5,265,859.17/3,578.74
6. Step 6: Final answer
   x = 1,471.43