Finding the Fourth Proportional to 2,109.72, 3,165.48 and 1,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.72 : 3,165.48 = 1,626.72 : x
2. Step 2: Convert to fraction form
   2,109.72/3,165.48 = 1,626.72/x
3. Step 3: Cross multiply
   2,109.72x = 3,165.48 × 1,626.72
4. Step 4: Simplify right side
   2,109.72x = 5,149,349.63
5. Step 5: Solve for x
   x = 5,149,349.63/2,109.72
6. Step 6: Final answer
   x = 2,440.77