Finding the Fourth Proportional to 12,695.68, 17,514.66 and 7,978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,695.68 : 17,514.66 = 7,978.24 : x
2. Step 2: Convert to fraction form
   12,695.68/17,514.66 = 7,978.24/x
3. Step 3: Cross multiply
   12,695.68x = 17,514.66 × 7,978.24
4. Step 4: Simplify right side
   12,695.68x = 139,736,161.00
5. Step 5: Solve for x
   x = 139,736,161.00/12,695.68
6. Step 6: Final answer
   x = 11,006.59