Finding the Fourth Proportional to 3,940.56, 5,918.98 and 3,809.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.56 : 5,918.98 = 3,809.34 : x
2. Step 2: Convert to fraction form
   3,940.56/5,918.98 = 3,809.34/x
3. Step 3: Cross multiply
   3,940.56x = 5,918.98 × 3,809.34
4. Step 4: Simplify right side
   3,940.56x = 22,547,407.27
5. Step 5: Solve for x
   x = 22,547,407.27/3,940.56
6. Step 6: Final answer
   x = 5,721.88