Finding the Fourth Proportional to 2,109.54, 2,907.57 and 1,445.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.54 : 2,907.57 = 1,445.22 : x
2. Step 2: Convert to fraction form
   2,109.54/2,907.57 = 1,445.22/x
3. Step 3: Cross multiply
   2,109.54x = 2,907.57 × 1,445.22
4. Step 4: Simplify right side
   2,109.54x = 4,202,078.32
5. Step 5: Solve for x
   x = 4,202,078.32/2,109.54
6. Step 6: Final answer
   x = 1,991.94