Finding the Fourth Proportional to 10,992.12, 15,162.24 and 7,215.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,992.12 : 15,162.24 = 7,215.48 : x
2. Step 2: Convert to fraction form
   10,992.12/15,162.24 = 7,215.48/x
3. Step 3: Cross multiply
   10,992.12x = 15,162.24 × 7,215.48
4. Step 4: Simplify right side
   10,992.12x = 109,402,839.48
5. Step 5: Solve for x
   x = 109,402,839.48/10,992.12
6. Step 6: Final answer
   x = 9,952.84