Finding the Fourth Proportional to 2,116.09, 3,174.60 and 817.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.09 : 3,174.60 = 817.56 : x
2. Step 2: Convert to fraction form
   2,116.09/3,174.60 = 817.56/x
3. Step 3: Cross multiply
   2,116.09x = 3,174.60 × 817.56
4. Step 4: Simplify right side
   2,116.09x = 2,595,425.98
5. Step 5: Solve for x
   x = 2,595,425.98/2,116.09
6. Step 6: Final answer
   x = 1,226.52