Finding the Fourth Proportional to 5,148.72, 7,105.60 and 2,910.81

Step by Step Solution

1. Step 1: Write the proportion equation
   5,148.72 : 7,105.60 = 2,910.81 : x
2. Step 2: Convert to fraction form
   5,148.72/7,105.60 = 2,910.81/x
3. Step 3: Cross multiply
   5,148.72x = 7,105.60 × 2,910.81
4. Step 4: Simplify right side
   5,148.72x = 20,683,051.54
5. Step 5: Solve for x
   x = 20,683,051.54/5,148.72
6. Step 6: Final answer
   x = 4,017.12