Finding the Fourth Proportional to 3,490.55, 5,228.84 and 2,103.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,490.55 : 5,228.84 = 2,103.15 : x
2. Step 2: Convert to fraction form
   3,490.55/5,228.84 = 2,103.15/x
3. Step 3: Cross multiply
   3,490.55x = 5,228.84 × 2,103.15
4. Step 4: Simplify right side
   3,490.55x = 10,997,040.10
5. Step 5: Solve for x
   x = 10,997,040.10/3,490.55
6. Step 6: Final answer
   x = 3,150.52