Finding the Fourth Proportional to 5,016.72, 7,515.48 and 2,818.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,016.72 : 7,515.48 = 2,818.80 : x
2. Step 2: Convert to fraction form
   5,016.72/7,515.48 = 2,818.80/x
3. Step 3: Cross multiply
   5,016.72x = 7,515.48 × 2,818.80
4. Step 4: Simplify right side
   5,016.72x = 21,184,635.02
5. Step 5: Solve for x
   x = 21,184,635.02/5,016.72
6. Step 6: Final answer
   x = 4,222.81