Finding the Fourth Proportional to 2,147.78, 2,962.94 and 1,485.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.78 : 2,962.94 = 1,485.56 : x
2. Step 2: Convert to fraction form
   2,147.78/2,962.94 = 1,485.56/x
3. Step 3: Cross multiply
   2,147.78x = 2,962.94 × 1,485.56
4. Step 4: Simplify right side
   2,147.78x = 4,401,625.15
5. Step 5: Solve for x
   x = 4,401,625.15/2,147.78
6. Step 6: Final answer
   x = 2,049.38