Finding the Fourth Proportional to 208,240.65, 287,351.69 and 123,341.31

Step by Step Solution

1. Step 1: Write the proportion equation
   208,240.65 : 287,351.69 = 123,341.31 : x
2. Step 2: Convert to fraction form
   208,240.65/287,351.69 = 123,341.31/x
3. Step 3: Cross multiply
   208,240.65x = 287,351.69 × 123,341.31
4. Step 4: Simplify right side
   208,240.65x = 35,442,333,258.61
5. Step 5: Solve for x
   x = 35,442,333,258.61/208,240.65
6. Step 6: Final answer
   x = 170,198.92