Finding the Fourth Proportional to 2,108.72, 2,907.46 and 1,921.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.72 : 2,907.46 = 1,921.44 : x
2. Step 2: Convert to fraction form
   2,108.72/2,907.46 = 1,921.44/x
3. Step 3: Cross multiply
   2,108.72x = 2,907.46 × 1,921.44
4. Step 4: Simplify right side
   2,108.72x = 5,586,509.94
5. Step 5: Solve for x
   x = 5,586,509.94/2,108.72
6. Step 6: Final answer
   x = 2,649.24