Finding the Fourth Proportional to 3,749.50, 5,618.78 and 2,109.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,749.50 : 5,618.78 = 2,109.25 : x
2. Step 2: Convert to fraction form
   3,749.50/5,618.78 = 2,109.25/x
3. Step 3: Cross multiply
   3,749.50x = 5,618.78 × 2,109.25
4. Step 4: Simplify right side
   3,749.50x = 11,851,411.72
5. Step 5: Solve for x
   x = 11,851,411.72/3,749.50
6. Step 6: Final answer
   x = 3,160.80