Finding the Fourth Proportional to 12,453.54, 17,188.17 and 7,979.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,453.54 : 17,188.17 = 7,979.22 : x
2. Step 2: Convert to fraction form
   12,453.54/17,188.17 = 7,979.22/x
3. Step 3: Cross multiply
   12,453.54x = 17,188.17 × 7,979.22
4. Step 4: Simplify right side
   12,453.54x = 137,148,189.83
5. Step 5: Solve for x
   x = 137,148,189.83/12,453.54
6. Step 6: Final answer
   x = 11,012.79