Finding the Fourth Proportional to 13,060.24, 18,022.78 and 7,091.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,060.24 : 18,022.78 = 7,091.72 : x
2. Step 2: Convert to fraction form
   13,060.24/18,022.78 = 7,091.72/x
3. Step 3: Cross multiply
   13,060.24x = 18,022.78 × 7,091.72
4. Step 4: Simplify right side
   13,060.24x = 127,812,509.38
5. Step 5: Solve for x
   x = 127,812,509.38/13,060.24
6. Step 6: Final answer
   x = 9,786.38