Finding the Fourth Proportional to 12,720.54, 17,554.09 and 7,054.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.54 : 17,554.09 = 7,054.38 : x
2. Step 2: Convert to fraction form
   12,720.54/17,554.09 = 7,054.38/x
3. Step 3: Cross multiply
   12,720.54x = 17,554.09 × 7,054.38
4. Step 4: Simplify right side
   12,720.54x = 123,833,098.37
5. Step 5: Solve for x
   x = 123,833,098.37/12,720.54
6. Step 6: Final answer
   x = 9,734.89