Finding the Fourth Proportional to 2,915.72, 4,025.12 and 1,976.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,915.72 : 4,025.12 = 1,976.46 : x
2. Step 2: Convert to fraction form
   2,915.72/4,025.12 = 1,976.46/x
3. Step 3: Cross multiply
   2,915.72x = 4,025.12 × 1,976.46
4. Step 4: Simplify right side
   2,915.72x = 7,955,488.68
5. Step 5: Solve for x
   x = 7,955,488.68/2,915.72
6. Step 6: Final answer
   x = 2,728.48