Finding the Fourth Proportional to 13,022.28, 17,973.63 and 7,647.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,022.28 : 17,973.63 = 7,647.12 : x
2. Step 2: Convert to fraction form
   13,022.28/17,973.63 = 7,647.12/x
3. Step 3: Cross multiply
   13,022.28x = 17,973.63 × 7,647.12
4. Step 4: Simplify right side
   13,022.28x = 137,446,505.45
5. Step 5: Solve for x
   x = 137,446,505.45/13,022.28
6. Step 6: Final answer
   x = 10,554.72