Finding the Fourth Proportional to 2,698.40, 3,724.83 and 2,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,698.40 : 3,724.83 = 2,109.12 : x
2. Step 2: Convert to fraction form
   2,698.40/3,724.83 = 2,109.12/x
3. Step 3: Cross multiply
   2,698.40x = 3,724.83 × 2,109.12
4. Step 4: Simplify right side
   2,698.40x = 7,856,113.45
5. Step 5: Solve for x
   x = 7,856,113.45/2,698.40
6. Step 6: Final answer
   x = 2,911.40