Finding the Fourth Proportional to 11,219.78, 16,825.71 and 3,320.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,219.78 : 16,825.71 = 3,320.18 : x
2. Step 2: Convert to fraction form
   11,219.78/16,825.71 = 3,320.18/x
3. Step 3: Cross multiply
   11,219.78x = 16,825.71 × 3,320.18
4. Step 4: Simplify right side
   11,219.78x = 55,864,385.83
5. Step 5: Solve for x
   x = 55,864,385.83/11,219.78
6. Step 6: Final answer
   x = 4,979.10