Finding the Fourth Proportional to 5,105.16, 7,045.89 and 3,116.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.16 : 7,045.89 = 3,116.87 : x
2. Step 2: Convert to fraction form
   5,105.16/7,045.89 = 3,116.87/x
3. Step 3: Cross multiply
   5,105.16x = 7,045.89 × 3,116.87
4. Step 4: Simplify right side
   5,105.16x = 21,961,107.58
5. Step 5: Solve for x
   x = 21,961,107.58/5,105.16
6. Step 6: Final answer
   x = 4,301.75