Finding the Fourth Proportional to 2,894.49, 3,988.31 and 1,961.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,894.49 : 3,988.31 = 1,961.37 : x
2. Step 2: Convert to fraction form
   2,894.49/3,988.31 = 1,961.37/x
3. Step 3: Cross multiply
   2,894.49x = 3,988.31 × 1,961.37
4. Step 4: Simplify right side
   2,894.49x = 7,822,541.78
5. Step 5: Solve for x
   x = 7,822,541.78/2,894.49
6. Step 6: Final answer
   x = 2,702.56