Finding the Fourth Proportional to 12,774.72, 17,628.93 and 7,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,774.72 : 17,628.93 = 7,185.72 : x
2. Step 2: Convert to fraction form
   12,774.72/17,628.93 = 7,185.72/x
3. Step 3: Cross multiply
   12,774.72x = 17,628.93 × 7,185.72
4. Step 4: Simplify right side
   12,774.72x = 126,676,554.88
5. Step 5: Solve for x
   x = 126,676,554.88/12,774.72
6. Step 6: Final answer
   x = 9,916.19