Finding the Fourth Proportional to 2,573.76, 3,551.83 and 1,439.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.76 : 3,551.83 = 1,439.56 : x
2. Step 2: Convert to fraction form
   2,573.76/3,551.83 = 1,439.56/x
3. Step 3: Cross multiply
   2,573.76x = 3,551.83 × 1,439.56
4. Step 4: Simplify right side
   2,573.76x = 5,113,058.32
5. Step 5: Solve for x
   x = 5,113,058.32/2,573.76
6. Step 6: Final answer
   x = 1,986.61