Finding the Fourth Proportional to 19,665.28, 29,490.09 and 7,182.46

Step by Step Solution

1. Step 1: Write the proportion equation
   19,665.28 : 29,490.09 = 7,182.46 : x
2. Step 2: Convert to fraction form
   19,665.28/29,490.09 = 7,182.46/x
3. Step 3: Cross multiply
   19,665.28x = 29,490.09 × 7,182.46
4. Step 4: Simplify right side
   19,665.28x = 211,811,391.82
5. Step 5: Solve for x
   x = 211,811,391.82/19,665.28
6. Step 6: Final answer
   x = 10,770.83