Finding the Fourth Proportional to 3,298.72, 4,945.20 and 2,814.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,298.72 : 4,945.20 = 2,814.88 : x
2. Step 2: Convert to fraction form
   3,298.72/4,945.20 = 2,814.88/x
3. Step 3: Cross multiply
   3,298.72x = 4,945.20 × 2,814.88
4. Step 4: Simplify right side
   3,298.72x = 13,920,144.58
5. Step 5: Solve for x
   x = 13,920,144.58/3,298.72
6. Step 6: Final answer
   x = 4,219.86