Finding the Fourth Proportional to 12,486.92, 17,231.82 and 7,181.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,486.92 : 17,231.82 = 7,181.60 : x
2. Step 2: Convert to fraction form
   12,486.92/17,231.82 = 7,181.60/x
3. Step 3: Cross multiply
   12,486.92x = 17,231.82 × 7,181.60
4. Step 4: Simplify right side
   12,486.92x = 123,752,038.51
5. Step 5: Solve for x
   x = 123,752,038.51/12,486.92
6. Step 6: Final answer
   x = 9,910.53