Finding the Fourth Proportional to 12,493.67, 17,243.25 and 7,187.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,493.67 : 17,243.25 = 7,187.45 : x
2. Step 2: Convert to fraction form
   12,493.67/17,243.25 = 7,187.45/x
3. Step 3: Cross multiply
   12,493.67x = 17,243.25 × 7,187.45
4. Step 4: Simplify right side
   12,493.67x = 123,934,997.21
5. Step 5: Solve for x
   x = 123,934,997.21/12,493.67
6. Step 6: Final answer
   x = 9,919.82