Finding the Fourth Proportional to 10,959, 15,123.42 and 5,991

Step by Step Solution

1. Step 1: Write the proportion equation
   10,959 : 15,123.42 = 5,991 : x
2. Step 2: Convert to fraction form
   10,959/15,123.42 = 5,991/x
3. Step 3: Cross multiply
   10,959x = 15,123.42 × 5,991
4. Step 4: Simplify right side
   10,959x = 90,604,409.22
5. Step 5: Solve for x
   x = 90,604,409.22/10,959
6. Step 6: Final answer
   x = 8,267.58