Finding the Fourth Proportional to 2,117.32, 3,174.56 and 817.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.32 : 3,174.56 = 817.27 : x
2. Step 2: Convert to fraction form
   2,117.32/3,174.56 = 817.27/x
3. Step 3: Cross multiply
   2,117.32x = 3,174.56 × 817.27
4. Step 4: Simplify right side
   2,117.32x = 2,594,463.69
5. Step 5: Solve for x
   x = 2,594,463.69/2,117.32
6. Step 6: Final answer
   x = 1,225.35