Finding the Fourth Proportional to 9,003.21, 12,423.83 and 5,645.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,003.21 : 12,423.83 = 5,645.88 : x
2. Step 2: Convert to fraction form
   9,003.21/12,423.83 = 5,645.88/x
3. Step 3: Cross multiply
   9,003.21x = 12,423.83 × 5,645.88
4. Step 4: Simplify right side
   9,003.21x = 70,143,453.32
5. Step 5: Solve for x
   x = 70,143,453.32/9,003.21
6. Step 6: Final answer
   x = 7,790.94