Finding the Fourth Proportional to 1,153.37, 1,591.90 and 681.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.37 : 1,591.90 = 681.09 : x
2. Step 2: Convert to fraction form
   1,153.37/1,591.90 = 681.09/x
3. Step 3: Cross multiply
   1,153.37x = 1,591.90 × 681.09
4. Step 4: Simplify right side
   1,153.37x = 1,084,227.17
5. Step 5: Solve for x
   x = 1,084,227.17/1,153.37
6. Step 6: Final answer
   x = 940.05