Finding the Fourth Proportional to 12,839.56, 17,720.18 and 7,250.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.56 : 17,720.18 = 7,250.52 : x
2. Step 2: Convert to fraction form
   12,839.56/17,720.18 = 7,250.52/x
3. Step 3: Cross multiply
   12,839.56x = 17,720.18 × 7,250.52
4. Step 4: Simplify right side
   12,839.56x = 128,480,519.49
5. Step 5: Solve for x
   x = 128,480,519.49/12,839.56
6. Step 6: Final answer
   x = 10,006.61