Finding the Fourth Proportional to 11,466.72, 15,825.12 and 6,990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,466.72 : 15,825.12 = 6,990.72 : x
2. Step 2: Convert to fraction form
   11,466.72/15,825.12 = 6,990.72/x
3. Step 3: Cross multiply
   11,466.72x = 15,825.12 × 6,990.72
4. Step 4: Simplify right side
   11,466.72x = 110,628,982.89
5. Step 5: Solve for x
   x = 110,628,982.89/11,466.72
6. Step 6: Final answer
   x = 9,647.83