Finding the Fourth Proportional to 12,643.50, 17,448.03 and 7,054.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,643.50 : 17,448.03 = 7,054.50 : x
2. Step 2: Convert to fraction form
   12,643.50/17,448.03 = 7,054.50/x
3. Step 3: Cross multiply
   12,643.50x = 17,448.03 × 7,054.50
4. Step 4: Simplify right side
   12,643.50x = 123,087,127.64
5. Step 5: Solve for x
   x = 123,087,127.64/12,643.50
6. Step 6: Final answer
   x = 9,735.21