Finding the Fourth Proportional to 2,109.04, 3,165.72 and 2,031.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.04 : 3,165.72 = 2,031.28 : x
2. Step 2: Convert to fraction form
   2,109.04/3,165.72 = 2,031.28/x
3. Step 3: Cross multiply
   2,109.04x = 3,165.72 × 2,031.28
4. Step 4: Simplify right side
   2,109.04x = 6,430,463.72
5. Step 5: Solve for x
   x = 6,430,463.72/2,109.04
6. Step 6: Final answer
   x = 3,049.00