Finding the Fourth Proportional to 12,722.03, 17,557.31 and 7,057.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.03 : 17,557.31 = 7,057.32 : x
2. Step 2: Convert to fraction form
   12,722.03/17,557.31 = 7,057.32/x
3. Step 3: Cross multiply
   12,722.03x = 17,557.31 × 7,057.32
4. Step 4: Simplify right side
   12,722.03x = 123,907,519.72
5. Step 5: Solve for x
   x = 123,907,519.72/12,722.03
6. Step 6: Final answer
   x = 9,739.60