Finding the Fourth Proportional to 12,735.61, 17,577.23 and 7,072.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,735.61 : 17,577.23 = 7,072.17 : x
2. Step 2: Convert to fraction form
   12,735.61/17,577.23 = 7,072.17/x
3. Step 3: Cross multiply
   12,735.61x = 17,577.23 × 7,072.17
4. Step 4: Simplify right side
   12,735.61x = 124,309,158.69
5. Step 5: Solve for x
   x = 124,309,158.69/12,735.61
6. Step 6: Final answer
   x = 9,760.75