Finding the Fourth Proportional to 2,108.38, 2,907.84 and 1,321.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.38 : 2,907.84 = 1,321.42 : x
2. Step 2: Convert to fraction form
   2,108.38/2,907.84 = 1,321.42/x
3. Step 3: Cross multiply
   2,108.38x = 2,907.84 × 1,321.42
4. Step 4: Simplify right side
   2,108.38x = 3,842,477.93
5. Step 5: Solve for x
   x = 3,842,477.93/2,108.38
6. Step 6: Final answer
   x = 1,822.48