Finding the Fourth Proportional to 11,944.74, 16,485.03 and 6,640.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,944.74 : 16,485.03 = 6,640.05 : x
2. Step 2: Convert to fraction form
   11,944.74/16,485.03 = 6,640.05/x
3. Step 3: Cross multiply
   11,944.74x = 16,485.03 × 6,640.05
4. Step 4: Simplify right side
   11,944.74x = 109,461,423.45
5. Step 5: Solve for x
   x = 109,461,423.45/11,944.74
6. Step 6: Final answer
   x = 9,163.99