Finding the Fourth Proportional to 12,749.36, 17,593.80 and 7,160.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,749.36 : 17,593.80 = 7,160.72 : x
2. Step 2: Convert to fraction form
   12,749.36/17,593.80 = 7,160.72/x
3. Step 3: Cross multiply
   12,749.36x = 17,593.80 × 7,160.72
4. Step 4: Simplify right side
   12,749.36x = 125,984,275.54
5. Step 5: Solve for x
   x = 125,984,275.54/12,749.36
6. Step 6: Final answer
   x = 9,881.62