Finding the Fourth Proportional to 2,103.48, 2,902.20 and 1,357.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.48 : 2,902.20 = 1,357.15 : x
2. Step 2: Convert to fraction form
   2,103.48/2,902.20 = 1,357.15/x
3. Step 3: Cross multiply
   2,103.48x = 2,902.20 × 1,357.15
4. Step 4: Simplify right side
   2,103.48x = 3,938,720.73
5. Step 5: Solve for x
   x = 3,938,720.73/2,103.48
6. Step 6: Final answer
   x = 1,872.48