Finding the Fourth Proportional to 10,986.24, 16,484.72 and 5,141.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,986.24 : 16,484.72 = 5,141.76 : x
2. Step 2: Convert to fraction form
   10,986.24/16,484.72 = 5,141.76/x
3. Step 3: Cross multiply
   10,986.24x = 16,484.72 × 5,141.76
4. Step 4: Simplify right side
   10,986.24x = 84,760,473.91
5. Step 5: Solve for x
   x = 84,760,473.91/10,986.24
6. Step 6: Final answer
   x = 7,715.15