Finding the Fourth Proportional to 5,216.22, 7,820.82 and 2,748.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,216.22 : 7,820.82 = 2,748.42 : x
2. Step 2: Convert to fraction form
   5,216.22/7,820.82 = 2,748.42/x
3. Step 3: Cross multiply
   5,216.22x = 7,820.82 × 2,748.42
4. Step 4: Simplify right side
   5,216.22x = 21,494,898.10
5. Step 5: Solve for x
   x = 21,494,898.10/5,216.22
6. Step 6: Final answer
   x = 4,120.78