Finding the Fourth Proportional to 2,103.32, 3,150.82 and 1,638.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.32 : 3,150.82 = 1,638.86 : x
2. Step 2: Convert to fraction form
   2,103.32/3,150.82 = 1,638.86/x
3. Step 3: Cross multiply
   2,103.32x = 3,150.82 × 1,638.86
4. Step 4: Simplify right side
   2,103.32x = 5,163,752.87
5. Step 5: Solve for x
   x = 5,163,752.87/2,103.32
6. Step 6: Final answer
   x = 2,455.05