Finding the Fourth Proportional to 8,692.69, 13,040.42 and 3,145.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,692.69 : 13,040.42 = 3,145.48 : x
2. Step 2: Convert to fraction form
   8,692.69/13,040.42 = 3,145.48/x
3. Step 3: Cross multiply
   8,692.69x = 13,040.42 × 3,145.48
4. Step 4: Simplify right side
   8,692.69x = 41,018,380.30
5. Step 5: Solve for x
   x = 41,018,380.30/8,692.69
6. Step 6: Final answer
   x = 4,718.72