Finding the Fourth Proportional to 2,915.89, 4,025.42 and 1,976.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,915.89 : 4,025.42 = 1,976.65 : x
2. Step 2: Convert to fraction form
   2,915.89/4,025.42 = 1,976.65/x
3. Step 3: Cross multiply
   2,915.89x = 4,025.42 × 1,976.65
4. Step 4: Simplify right side
   2,915.89x = 7,956,846.44
5. Step 5: Solve for x
   x = 7,956,846.44/2,915.89
6. Step 6: Final answer
   x = 2,728.79