Finding the Fourth Proportional to 403,665.15, 557,016.03 and 248,591.82

Step by Step Solution

1. Step 1: Write the proportion equation
   403,665.15 : 557,016.03 = 248,591.82 : x
2. Step 2: Convert to fraction form
   403,665.15/557,016.03 = 248,591.82/x
3. Step 3: Cross multiply
   403,665.15x = 557,016.03 × 248,591.82
4. Step 4: Simplify right side
   403,665.15x = 138,469,628,666.88
5. Step 5: Solve for x
   x = 138,469,628,666.88/403,665.15
6. Step 6: Final answer
   x = 343,030.92