Finding the Fourth Proportional to 10,947.25, 15,107.21 and 5,979.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,947.25 : 15,107.21 = 5,979.25 : x
2. Step 2: Convert to fraction form
   10,947.25/15,107.21 = 5,979.25/x
3. Step 3: Cross multiply
   10,947.25x = 15,107.21 × 5,979.25
4. Step 4: Simplify right side
   10,947.25x = 90,329,755.50
5. Step 5: Solve for x
   x = 90,329,755.50/10,947.25
6. Step 6: Final answer
   x = 8,251.37