Finding the Fourth Proportional to 7,140.72, 10,714.72 and 3,244.64

Step by Step Solution

1. Step 1: Write the proportion equation
   7,140.72 : 10,714.72 = 3,244.64 : x
2. Step 2: Convert to fraction form
   7,140.72/10,714.72 = 3,244.64/x
3. Step 3: Cross multiply
   7,140.72x = 10,714.72 × 3,244.64
4. Step 4: Simplify right side
   7,140.72x = 34,765,409.10
5. Step 5: Solve for x
   x = 34,765,409.10/7,140.72
6. Step 6: Final answer
   x = 4,868.61