Finding the Fourth Proportional to 830.54, 1,142.71 and 810.03

Step by Step Solution

1. Step 1: Write the proportion equation
   830.54 : 1,142.71 = 810.03 : x
2. Step 2: Convert to fraction form
   830.54/1,142.71 = 810.03/x
3. Step 3: Cross multiply
   830.54x = 1,142.71 × 810.03
4. Step 4: Simplify right side
   830.54x = 925,629.38
5. Step 5: Solve for x
   x = 925,629.38/830.54
6. Step 6: Final answer
   x = 1,114.50