Finding the Fourth Proportional to 8,890.72, 12,284.40 and 7,041.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,890.72 : 12,284.40 = 7,041.76 : x
2. Step 2: Convert to fraction form
   8,890.72/12,284.40 = 7,041.76/x
3. Step 3: Cross multiply
   8,890.72x = 12,284.40 × 7,041.76
4. Step 4: Simplify right side
   8,890.72x = 86,503,796.54
5. Step 5: Solve for x
   x = 86,503,796.54/8,890.72
6. Step 6: Final answer
   x = 9,729.67