Finding the Fourth Proportional to 3,539.82, 5,309.82 and 1,989.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,539.82 : 5,309.82 = 1,989.72 : x
2. Step 2: Convert to fraction form
   3,539.82/5,309.82 = 1,989.72/x
3. Step 3: Cross multiply
   3,539.82x = 5,309.82 × 1,989.72
4. Step 4: Simplify right side
   3,539.82x = 10,565,055.05
5. Step 5: Solve for x
   x = 10,565,055.05/3,539.82
6. Step 6: Final answer
   x = 2,984.63