Finding the Fourth Proportional to 10,824.50, 16,215.72 and 7,115.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,824.50 : 16,215.72 = 7,115.48 : x
2. Step 2: Convert to fraction form
   10,824.50/16,215.72 = 7,115.48/x
3. Step 3: Cross multiply
   10,824.50x = 16,215.72 × 7,115.48
4. Step 4: Simplify right side
   10,824.50x = 115,382,631.35
5. Step 5: Solve for x
   x = 115,382,631.35/10,824.50
6. Step 6: Final answer
   x = 10,659.40