Finding the Fourth Proportional to 3,947.50, 5,449.32 and 2,603.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.50 : 5,449.32 = 2,603.90 : x
2. Step 2: Convert to fraction form
   3,947.50/5,449.32 = 2,603.90/x
3. Step 3: Cross multiply
   3,947.50x = 5,449.32 × 2,603.90
4. Step 4: Simplify right side
   3,947.50x = 14,189,450.89
5. Step 5: Solve for x
   x = 14,189,450.89/3,947.50
6. Step 6: Final answer
   x = 3,594.55