Finding the Fourth Proportional to 2,109.90, 3,168.45 and 2,045.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.90 : 3,168.45 = 2,045.10 : x
2. Step 2: Convert to fraction form
   2,109.90/3,168.45 = 2,045.10/x
3. Step 3: Cross multiply
   2,109.90x = 3,168.45 × 2,045.10
4. Step 4: Simplify right side
   2,109.90x = 6,479,797.10
5. Step 5: Solve for x
   x = 6,479,797.10/2,109.90
6. Step 6: Final answer
   x = 3,071.14