Finding the Fourth Proportional to 12,850.72, 17,734.87 and 7,185.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,850.72 : 17,734.87 = 7,185.35 : x
2. Step 2: Convert to fraction form
   12,850.72/17,734.87 = 7,185.35/x
3. Step 3: Cross multiply
   12,850.72x = 17,734.87 × 7,185.35
4. Step 4: Simplify right side
   12,850.72x = 127,431,266.12
5. Step 5: Solve for x
   x = 127,431,266.12/12,850.72
6. Step 6: Final answer
   x = 9,916.28