Finding the Fourth Proportional to 10,821.30, 16,229.61 and 3,426.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,821.30 : 16,229.61 = 3,426.36 : x
2. Step 2: Convert to fraction form
   10,821.30/16,229.61 = 3,426.36/x
3. Step 3: Cross multiply
   10,821.30x = 16,229.61 × 3,426.36
4. Step 4: Simplify right side
   10,821.30x = 55,608,486.52
5. Step 5: Solve for x
   x = 55,608,486.52/10,821.30
6. Step 6: Final answer
   x = 5,138.80