Finding the Fourth Proportional to 10,817.16, 16,216.80 and 3,417

Step by Step Solution

1. Step 1: Write the proportion equation
   10,817.16 : 16,216.80 = 3,417 : x
2. Step 2: Convert to fraction form
   10,817.16/16,216.80 = 3,417/x
3. Step 3: Cross multiply
   10,817.16x = 16,216.80 × 3,417
4. Step 4: Simplify right side
   10,817.16x = 55,412,805.60
5. Step 5: Solve for x
   x = 55,412,805.60/10,817.16
6. Step 6: Final answer
   x = 5,122.68