Finding the Fourth Proportional to 2,097.78, 3,147.71 and 1,485.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.78 : 3,147.71 = 1,485.42 : x
2. Step 2: Convert to fraction form
   2,097.78/3,147.71 = 1,485.42/x
3. Step 3: Cross multiply
   2,097.78x = 3,147.71 × 1,485.42
4. Step 4: Simplify right side
   2,097.78x = 4,675,671.39
5. Step 5: Solve for x
   x = 4,675,671.39/2,097.78
6. Step 6: Final answer
   x = 2,228.87