Finding the Fourth Proportional to 2,116.02, 3,174.05 and 817.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.02 : 3,174.05 = 817.30 : x
2. Step 2: Convert to fraction form
   2,116.02/3,174.05 = 817.30/x
3. Step 3: Cross multiply
   2,116.02x = 3,174.05 × 817.30
4. Step 4: Simplify right side
   2,116.02x = 2,594,151.07
5. Step 5: Solve for x
   x = 2,594,151.07/2,116.02
6. Step 6: Final answer
   x = 1,225.96