Finding the Fourth Proportional to 336,019.47, 502,844.81 and 209,718.86

Step by Step Solution

1. Step 1: Write the proportion equation
   336,019.47 : 502,844.81 = 209,718.86 : x
2. Step 2: Convert to fraction form
   336,019.47/502,844.81 = 209,718.86/x
3. Step 3: Cross multiply
   336,019.47x = 502,844.81 × 209,718.86
4. Step 4: Simplify right side
   336,019.47x = 105,456,036,747.30
5. Step 5: Solve for x
   x = 105,456,036,747.30/336,019.47
6. Step 6: Final answer
   x = 313,839.07