Finding the Fourth Proportional to 12,748.72, 17,583.87 and 7,443.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,748.72 : 17,583.87 = 7,443.22 : x
2. Step 2: Convert to fraction form
   12,748.72/17,583.87 = 7,443.22/x
3. Step 3: Cross multiply
   12,748.72x = 17,583.87 × 7,443.22
4. Step 4: Simplify right side
   12,748.72x = 130,880,612.86
5. Step 5: Solve for x
   x = 130,880,612.86/12,748.72
6. Step 6: Final answer
   x = 10,266.18