Finding the Fourth Proportional to 1,200.47, 1,799.78 and 681.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.47 : 1,799.78 = 681.05 : x
2. Step 2: Convert to fraction form
   1,200.47/1,799.78 = 681.05/x
3. Step 3: Cross multiply
   1,200.47x = 1,799.78 × 681.05
4. Step 4: Simplify right side
   1,200.47x = 1,225,727.76
5. Step 5: Solve for x
   x = 1,225,727.76/1,200.47
6. Step 6: Final answer
   x = 1,021.04