Finding the Fourth Proportional to 2,109.42, 3,166.56 and 1,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.42 : 3,166.56 = 1,647.72 : x
2. Step 2: Convert to fraction form
   2,109.42/3,166.56 = 1,647.72/x
3. Step 3: Cross multiply
   2,109.42x = 3,166.56 × 1,647.72
4. Step 4: Simplify right side
   2,109.42x = 5,217,604.24
5. Step 5: Solve for x
   x = 5,217,604.24/2,109.42
6. Step 6: Final answer
   x = 2,473.48