Finding the Fourth Proportional to 1,173.91, 1,760.83 and 681.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.91 : 1,760.83 = 681.05 : x
2. Step 2: Convert to fraction form
   1,173.91/1,760.83 = 681.05/x
3. Step 3: Cross multiply
   1,173.91x = 1,760.83 × 681.05
4. Step 4: Simplify right side
   1,173.91x = 1,199,213.27
5. Step 5: Solve for x
   x = 1,199,213.27/1,173.91
6. Step 6: Final answer
   x = 1,021.55