Finding the Fourth Proportional to 1,816.43, 2,720.79 and 1,200.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.43 : 2,720.79 = 1,200.42 : x
2. Step 2: Convert to fraction form
   1,816.43/2,720.79 = 1,200.42/x
3. Step 3: Cross multiply
   1,816.43x = 2,720.79 × 1,200.42
4. Step 4: Simplify right side
   1,816.43x = 3,266,090.73
5. Step 5: Solve for x
   x = 3,266,090.73/1,816.43
6. Step 6: Final answer
   x = 1,798.09