Finding the Fourth Proportional to 8,960.48, 13,443.15 and 3,117.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,960.48 : 13,443.15 = 3,117.55 : x
2. Step 2: Convert to fraction form
   8,960.48/13,443.15 = 3,117.55/x
3. Step 3: Cross multiply
   8,960.48x = 13,443.15 × 3,117.55
4. Step 4: Simplify right side
   8,960.48x = 41,909,692.28
5. Step 5: Solve for x
   x = 41,909,692.28/8,960.48
6. Step 6: Final answer
   x = 4,677.17