Finding the Fourth Proportional to 2,579.72, 3,870.14 and 848.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.72 : 3,870.14 = 848.28 : x
2. Step 2: Convert to fraction form
   2,579.72/3,870.14 = 848.28/x
3. Step 3: Cross multiply
   2,579.72x = 3,870.14 × 848.28
4. Step 4: Simplify right side
   2,579.72x = 3,282,962.36
5. Step 5: Solve for x
   x = 3,282,962.36/2,579.72
6. Step 6: Final answer
   x = 1,272.60