Finding the Fourth Proportional to 2,603.45, 3,905.52 and 961.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.45 : 3,905.52 = 961.15 : x
2. Step 2: Convert to fraction form
   2,603.45/3,905.52 = 961.15/x
3. Step 3: Cross multiply
   2,603.45x = 3,905.52 × 961.15
4. Step 4: Simplify right side
   2,603.45x = 3,753,784.50
5. Step 5: Solve for x
   x = 3,753,784.50/2,603.45
6. Step 6: Final answer
   x = 1,441.85