Finding the Fourth Proportional to 5,105.81, 7,046.78 and 3,117.51

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.81 : 7,046.78 = 3,117.51 : x
2. Step 2: Convert to fraction form
   5,105.81/7,046.78 = 3,117.51/x
3. Step 3: Cross multiply
   5,105.81x = 7,046.78 × 3,117.51
4. Step 4: Simplify right side
   5,105.81x = 21,968,391.53
5. Step 5: Solve for x
   x = 21,968,391.53/5,105.81
6. Step 6: Final answer
   x = 4,302.62