Finding the Fourth Proportional to 2,279.22, 3,140.73 and 1,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.22 : 3,140.73 = 1,647.72 : x
2. Step 2: Convert to fraction form
   2,279.22/3,140.73 = 1,647.72/x
3. Step 3: Cross multiply
   2,279.22x = 3,140.73 × 1,647.72
4. Step 4: Simplify right side
   2,279.22x = 5,175,043.64
5. Step 5: Solve for x
   x = 5,175,043.64/2,279.22
6. Step 6: Final answer
   x = 2,270.53