Finding the Fourth Proportional to 12,707.24, 19,057.78 and 5,307.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,707.24 : 19,057.78 = 5,307.68 : x
2. Step 2: Convert to fraction form
   12,707.24/19,057.78 = 5,307.68/x
3. Step 3: Cross multiply
   12,707.24x = 19,057.78 × 5,307.68
4. Step 4: Simplify right side
   12,707.24x = 101,152,597.75
5. Step 5: Solve for x
   x = 101,152,597.75/12,707.24
6. Step 6: Final answer
   x = 7,960.23