Finding the Fourth Proportional to 12,746.22, 17,580.42 and 7,440.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,746.22 : 17,580.42 = 7,440.72 : x
2. Step 2: Convert to fraction form
   12,746.22/17,580.42 = 7,440.72/x
3. Step 3: Cross multiply
   12,746.22x = 17,580.42 × 7,440.72
4. Step 4: Simplify right side
   12,746.22x = 130,810,982.70
5. Step 5: Solve for x
   x = 130,810,982.70/12,746.22
6. Step 6: Final answer
   x = 10,262.73