Finding the Fourth Proportional to 12,643.98, 17,449.50 and 7,054.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,643.98 : 17,449.50 = 7,054.98 : x
2. Step 2: Convert to fraction form
   12,643.98/17,449.50 = 7,054.98/x
3. Step 3: Cross multiply
   12,643.98x = 17,449.50 × 7,054.98
4. Step 4: Simplify right side
   12,643.98x = 123,105,873.51
5. Step 5: Solve for x
   x = 123,105,873.51/12,643.98
6. Step 6: Final answer
   x = 9,736.32