Finding the Fourth Proportional to 11,182.50, 15,433.30 and 7,215.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,182.50 : 15,433.30 = 7,215.15 : x
2. Step 2: Convert to fraction form
   11,182.50/15,433.30 = 7,215.15/x
3. Step 3: Cross multiply
   11,182.50x = 15,433.30 × 7,215.15
4. Step 4: Simplify right side
   11,182.50x = 111,353,574.50
5. Step 5: Solve for x
   x = 111,353,574.50/11,182.50
6. Step 6: Final answer
   x = 9,957.85