Finding the Fourth Proportional to 2,115.54, 2,913.57 and 1,951.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.54 : 2,913.57 = 1,951.38 : x
2. Step 2: Convert to fraction form
   2,115.54/2,913.57 = 1,951.38/x
3. Step 3: Cross multiply
   2,115.54x = 2,913.57 × 1,951.38
4. Step 4: Simplify right side
   2,115.54x = 5,685,482.23
5. Step 5: Solve for x
   x = 5,685,482.23/2,115.54
6. Step 6: Final answer
   x = 2,687.49