Finding the Fourth Proportional to 5,123.16, 7,069.59 and 3,108.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.16 : 7,069.59 = 3,108.38 : x
2. Step 2: Convert to fraction form
   5,123.16/7,069.59 = 3,108.38/x
3. Step 3: Cross multiply
   5,123.16x = 7,069.59 × 3,108.38
4. Step 4: Simplify right side
   5,123.16x = 21,974,936.82
5. Step 5: Solve for x
   x = 21,974,936.82/5,123.16
6. Step 6: Final answer
   x = 4,289.33