Finding the Fourth Proportional to 10,959.12, 15,123.36 and 5,991.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,959.12 : 15,123.36 = 5,991.12 : x
2. Step 2: Convert to fraction form
   10,959.12/15,123.36 = 5,991.12/x
3. Step 3: Cross multiply
   10,959.12x = 15,123.36 × 5,991.12
4. Step 4: Simplify right side
   10,959.12x = 90,605,864.56
5. Step 5: Solve for x
   x = 90,605,864.56/10,959.12
6. Step 6: Final answer
   x = 8,267.62