Finding the Fourth Proportional to 1,340.96, 1,850.45 and 816.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.96 : 1,850.45 = 816.89 : x
2. Step 2: Convert to fraction form
   1,340.96/1,850.45 = 816.89/x
3. Step 3: Cross multiply
   1,340.96x = 1,850.45 × 816.89
4. Step 4: Simplify right side
   1,340.96x = 1,511,600.76
5. Step 5: Solve for x
   x = 1,511,600.76/1,340.96
6. Step 6: Final answer
   x = 1,127.26