Finding the Fourth Proportional to 12,642.24, 17,447.28 and 7,054.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,642.24 : 17,447.28 = 7,054.08 : x
2. Step 2: Convert to fraction form
   12,642.24/17,447.28 = 7,054.08/x
3. Step 3: Cross multiply
   12,642.24x = 17,447.28 × 7,054.08
4. Step 4: Simplify right side
   12,642.24x = 123,074,508.90
5. Step 5: Solve for x
   x = 123,074,508.90/12,642.24
6. Step 6: Final answer
   x = 9,735.18