Finding the Fourth Proportional to 2,109.14, 3,159.90 and 1,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.14 : 3,159.90 = 1,698.50 : x
2. Step 2: Convert to fraction form
   2,109.14/3,159.90 = 1,698.50/x
3. Step 3: Cross multiply
   2,109.14x = 3,159.90 × 1,698.50
4. Step 4: Simplify right side
   2,109.14x = 5,367,090.15
5. Step 5: Solve for x
   x = 5,367,090.15/2,109.14
6. Step 6: Final answer
   x = 2,544.68