Finding the Fourth Proportional to 12,490.25, 17,236.59 and 7,185.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,490.25 : 17,236.59 = 7,185.38 : x
2. Step 2: Convert to fraction form
   12,490.25/17,236.59 = 7,185.38/x
3. Step 3: Cross multiply
   12,490.25x = 17,236.59 × 7,185.38
4. Step 4: Simplify right side
   12,490.25x = 123,851,449.05
5. Step 5: Solve for x
   x = 123,851,449.05/12,490.25
6. Step 6: Final answer
   x = 9,915.85