Finding the Fourth Proportional to 10,848.56, 16,272.72 and 2,640.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,848.56 : 16,272.72 = 2,640.56 : x
2. Step 2: Convert to fraction form
   10,848.56/16,272.72 = 2,640.56/x
3. Step 3: Cross multiply
   10,848.56x = 16,272.72 × 2,640.56
4. Step 4: Simplify right side
   10,848.56x = 42,969,093.52
5. Step 5: Solve for x
   x = 42,969,093.52/10,848.56
6. Step 6: Final answer
   x = 3,960.81