Finding the Fourth Proportional to 8,003.21, 12,017.77 and 7,666.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,003.21 : 12,017.77 = 7,666.25 : x
2. Step 2: Convert to fraction form
   8,003.21/12,017.77 = 7,666.25/x
3. Step 3: Cross multiply
   8,003.21x = 12,017.77 × 7,666.25
4. Step 4: Simplify right side
   8,003.21x = 92,131,150.01
5. Step 5: Solve for x
   x = 92,131,150.01/8,003.21
6. Step 6: Final answer
   x = 11,511.78