Finding the Fourth Proportional to 3,822.60, 5,259.15 and 3,603.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,822.60 : 5,259.15 = 3,603.90 : x
2. Step 2: Convert to fraction form
   3,822.60/5,259.15 = 3,603.90/x
3. Step 3: Cross multiply
   3,822.60x = 5,259.15 × 3,603.90
4. Step 4: Simplify right side
   3,822.60x = 18,953,450.69
5. Step 5: Solve for x
   x = 18,953,450.69/3,822.60
6. Step 6: Final answer
   x = 4,958.26