Finding the Fourth Proportional to 7,105.80, 9,805.98 and 4,123.38

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.80 : 9,805.98 = 4,123.38 : x
2. Step 2: Convert to fraction form
   7,105.80/9,805.98 = 4,123.38/x
3. Step 3: Cross multiply
   7,105.80x = 9,805.98 × 4,123.38
4. Step 4: Simplify right side
   7,105.80x = 40,433,781.81
5. Step 5: Solve for x
   x = 40,433,781.81/7,105.80
6. Step 6: Final answer
   x = 5,690.25