Finding the Fourth Proportional to 12,718.15, 17,559.73 and 7,945.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,718.15 : 17,559.73 = 7,945.36 : x
2. Step 2: Convert to fraction form
   12,718.15/17,559.73 = 7,945.36/x
3. Step 3: Cross multiply
   12,718.15x = 17,559.73 × 7,945.36
4. Step 4: Simplify right side
   12,718.15x = 139,518,308.42
5. Step 5: Solve for x
   x = 139,518,308.42/12,718.15
6. Step 6: Final answer
   x = 10,970.02