Finding the Fourth Proportional to 12,003.12, 16,554.78 and 7,287.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,003.12 : 16,554.78 = 7,287.30 : x
2. Step 2: Convert to fraction form
   12,003.12/16,554.78 = 7,287.30/x
3. Step 3: Cross multiply
   12,003.12x = 16,554.78 × 7,287.30
4. Step 4: Simplify right side
   12,003.12x = 120,639,648.29
5. Step 5: Solve for x
   x = 120,639,648.29/12,003.12
6. Step 6: Final answer
   x = 10,050.69