Finding the Fourth Proportional to 12,979.58, 17,911.82 and 7,011.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979.58 : 17,911.82 = 7,011.25 : x
2. Step 2: Convert to fraction form
   12,979.58/17,911.82 = 7,011.25/x
3. Step 3: Cross multiply
   12,979.58x = 17,911.82 × 7,011.25
4. Step 4: Simplify right side
   12,979.58x = 125,584,287.89
5. Step 5: Solve for x
   x = 125,584,287.89/12,979.58
6. Step 6: Final answer
   x = 9,675.53