Finding the Fourth Proportional to 10,812.26, 16,215.76 and 3,415.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,812.26 : 16,215.76 = 3,415.34 : x
2. Step 2: Convert to fraction form
   10,812.26/16,215.76 = 3,415.34/x
3. Step 3: Cross multiply
   10,812.26x = 16,215.76 × 3,415.34
4. Step 4: Simplify right side
   10,812.26x = 55,382,333.76
5. Step 5: Solve for x
   x = 55,382,333.76/10,812.26
6. Step 6: Final answer
   x = 5,122.18