Finding the Fourth Proportional to 1,341.28, 1,850.61 and 817.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.28 : 1,850.61 = 817.30 : x
2. Step 2: Convert to fraction form
   1,341.28/1,850.61 = 817.30/x
3. Step 3: Cross multiply
   1,341.28x = 1,850.61 × 817.30
4. Step 4: Simplify right side
   1,341.28x = 1,512,503.55
5. Step 5: Solve for x
   x = 1,512,503.55/1,341.28
6. Step 6: Final answer
   x = 1,127.66