Finding the Fourth Proportional to 2,103.60, 3,155.12 and 1,521.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.60 : 3,155.12 = 1,521.38 : x
2. Step 2: Convert to fraction form
   2,103.60/3,155.12 = 1,521.38/x
3. Step 3: Cross multiply
   2,103.60x = 3,155.12 × 1,521.38
4. Step 4: Simplify right side
   2,103.60x = 4,800,136.47
5. Step 5: Solve for x
   x = 4,800,136.47/2,103.60
6. Step 6: Final answer
   x = 2,281.87