Finding the Fourth Proportional to 3,528.72, 4,868.86 and 2,131.44

Step by Step Solution

1. Step 1: Write the proportion equation
   3,528.72 : 4,868.86 = 2,131.44 : x
2. Step 2: Convert to fraction form
   3,528.72/4,868.86 = 2,131.44/x
3. Step 3: Cross multiply
   3,528.72x = 4,868.86 × 2,131.44
4. Step 4: Simplify right side
   3,528.72x = 10,377,682.96
5. Step 5: Solve for x
   x = 10,377,682.96/3,528.72
6. Step 6: Final answer
   x = 2,940.92