Finding the Fourth Proportional to 2,928.76, 4,392.18 and 848.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.76 : 4,392.18 = 848.56 : x
2. Step 2: Convert to fraction form
   2,928.76/4,392.18 = 848.56/x
3. Step 3: Cross multiply
   2,928.76x = 4,392.18 × 848.56
4. Step 4: Simplify right side
   2,928.76x = 3,727,028.26
5. Step 5: Solve for x
   x = 3,727,028.26/2,928.76
6. Step 6: Final answer
   x = 1,272.56