Finding the Fourth Proportional to 1,129.36, 1,558.71 and 681.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.36 : 1,558.71 = 681.59 : x
2. Step 2: Convert to fraction form
   1,129.36/1,558.71 = 681.59/x
3. Step 3: Cross multiply
   1,129.36x = 1,558.71 × 681.59
4. Step 4: Simplify right side
   1,129.36x = 1,062,401.15
5. Step 5: Solve for x
   x = 1,062,401.15/1,129.36
6. Step 6: Final answer
   x = 940.71