Finding the Fourth Proportional to 2,962.54, 4,085.94 and 1,912.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,962.54 : 4,085.94 = 1,912.78 : x
2. Step 2: Convert to fraction form
   2,962.54/4,085.94 = 1,912.78/x
3. Step 3: Cross multiply
   2,962.54x = 4,085.94 × 1,912.78
4. Step 4: Simplify right side
   2,962.54x = 7,815,504.31
5. Step 5: Solve for x
   x = 7,815,504.31/2,962.54
6. Step 6: Final answer
   x = 2,638.11