Finding the Fourth Proportional to 2,109.80, 2,895.98 and 1,868.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.80 : 2,895.98 = 1,868.49 : x
2. Step 2: Convert to fraction form
   2,109.80/2,895.98 = 1,868.49/x
3. Step 3: Cross multiply
   2,109.80x = 2,895.98 × 1,868.49
4. Step 4: Simplify right side
   2,109.80x = 5,411,100.33
5. Step 5: Solve for x
   x = 5,411,100.33/2,109.80
6. Step 6: Final answer
   x = 2,564.74