Finding the Fourth Proportional to 1,851.50, 2,777.48 and 681.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.50 : 2,777.48 = 681.31 : x
2. Step 2: Convert to fraction form
   1,851.50/2,777.48 = 681.31/x
3. Step 3: Cross multiply
   1,851.50x = 2,777.48 × 681.31
4. Step 4: Simplify right side
   1,851.50x = 1,892,311.01
5. Step 5: Solve for x
   x = 1,892,311.01/1,851.50
6. Step 6: Final answer
   x = 1,022.04