Finding the Fourth Proportional to 19,659.72, 27,130.72 and 10,707.21

Step by Step Solution

1. Step 1: Write the proportion equation
   19,659.72 : 27,130.72 = 10,707.21 : x
2. Step 2: Convert to fraction form
   19,659.72/27,130.72 = 10,707.21/x
3. Step 3: Cross multiply
   19,659.72x = 27,130.72 × 10,707.21
4. Step 4: Simplify right side
   19,659.72x = 290,494,371.05
5. Step 5: Solve for x
   x = 290,494,371.05/19,659.72
6. Step 6: Final answer
   x = 14,776.12