Finding the Fourth Proportional to 10,809.35, 16,215.37 and 3,412.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,809.35 : 16,215.37 = 3,412.72 : x
2. Step 2: Convert to fraction form
   10,809.35/16,215.37 = 3,412.72/x
3. Step 3: Cross multiply
   10,809.35x = 16,215.37 × 3,412.72
4. Step 4: Simplify right side
   10,809.35x = 55,338,517.51
5. Step 5: Solve for x
   x = 55,338,517.51/10,809.35
6. Step 6: Final answer
   x = 5,119.50