Finding the Fourth Proportional to 3,525.72, 4,864.72 and 2,128.44

Step by Step Solution

1. Step 1: Write the proportion equation
   3,525.72 : 4,864.72 = 2,128.44 : x
2. Step 2: Convert to fraction form
   3,525.72/4,864.72 = 2,128.44/x
3. Step 3: Cross multiply
   3,525.72x = 4,864.72 × 2,128.44
4. Step 4: Simplify right side
   3,525.72x = 10,354,264.64
5. Step 5: Solve for x
   x = 10,354,264.64/3,525.72
6. Step 6: Final answer
   x = 2,936.78