Finding the Fourth Proportional to 12,643.56, 17,448.10 and 7,054.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,643.56 : 17,448.10 = 7,054.56 : x
2. Step 2: Convert to fraction form
   12,643.56/17,448.10 = 7,054.56/x
3. Step 3: Cross multiply
   12,643.56x = 17,448.10 × 7,054.56
4. Step 4: Simplify right side
   12,643.56x = 123,088,545.82
5. Step 5: Solve for x
   x = 123,088,545.82/12,643.56
6. Step 6: Final answer
   x = 9,735.28