Finding the Fourth Proportional to 5,106.72, 7,047.92 and 3,116.85

Step by Step Solution

1. Step 1: Write the proportion equation
   5,106.72 : 7,047.92 = 3,116.85 : x
2. Step 2: Convert to fraction form
   5,106.72/7,047.92 = 3,116.85/x
3. Step 3: Cross multiply
   5,106.72x = 7,047.92 × 3,116.85
4. Step 4: Simplify right side
   5,106.72x = 21,967,309.45
5. Step 5: Solve for x
   x = 21,967,309.45/5,106.72
6. Step 6: Final answer
   x = 4,301.65