Finding the Fourth Proportional to 1,213.03, 1,673.88 and 681.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213.03 : 1,673.88 = 681.82 : x
2. Step 2: Convert to fraction form
   1,213.03/1,673.88 = 681.82/x
3. Step 3: Cross multiply
   1,213.03x = 1,673.88 × 681.82
4. Step 4: Simplify right side
   1,213.03x = 1,141,293.45
5. Step 5: Solve for x
   x = 1,141,293.45/1,213.03
6. Step 6: Final answer
   x = 940.87