Finding the Fourth Proportional to 2,103.76, 3,155.55 and 1,415.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.76 : 3,155.55 = 1,415.35 : x
2. Step 2: Convert to fraction form
   2,103.76/3,155.55 = 1,415.35/x
3. Step 3: Cross multiply
   2,103.76x = 3,155.55 × 1,415.35
4. Step 4: Simplify right side
   2,103.76x = 4,466,207.69
5. Step 5: Solve for x
   x = 4,466,207.69/2,103.76
6. Step 6: Final answer
   x = 2,122.96