Finding the Fourth Proportional to 12,723.39, 17,558.76 and 7,058.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,723.39 : 17,558.76 = 7,058.15 : x
2. Step 2: Convert to fraction form
   12,723.39/17,558.76 = 7,058.15/x
3. Step 3: Cross multiply
   12,723.39x = 17,558.76 × 7,058.15
4. Step 4: Simplify right side
   12,723.39x = 123,932,361.89
5. Step 5: Solve for x
   x = 123,932,361.89/12,723.39
6. Step 6: Final answer
   x = 9,740.51