Finding the Fourth Proportional to 1,205.43, 1,663.50 and 681.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205.43 : 1,663.50 = 681.46 : x
2. Step 2: Convert to fraction form
   1,205.43/1,663.50 = 681.46/x
3. Step 3: Cross multiply
   1,205.43x = 1,663.50 × 681.46
4. Step 4: Simplify right side
   1,205.43x = 1,133,610.71
5. Step 5: Solve for x
   x = 1,133,610.71/1,205.43
6. Step 6: Final answer
   x = 940.42