Finding the Fourth Proportional to 12,736.20, 17,577.06 and 7,072.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,736.20 : 17,577.06 = 7,072.04 : x
2. Step 2: Convert to fraction form
   12,736.20/17,577.06 = 7,072.04/x
3. Step 3: Cross multiply
   12,736.20x = 17,577.06 × 7,072.04
4. Step 4: Simplify right side
   12,736.20x = 124,305,583.52
5. Step 5: Solve for x
   x = 124,305,583.52/12,736.20
6. Step 6: Final answer
   x = 9,760.02