Finding the Fourth Proportional to 424,484.69, 636,789.56 and 140,204.79

Step by Step Solution

1. Step 1: Write the proportion equation
   424,484.69 : 636,789.56 = 140,204.79 : x
2. Step 2: Convert to fraction form
   424,484.69/636,789.56 = 140,204.79/x
3. Step 3: Cross multiply
   424,484.69x = 636,789.56 × 140,204.79
4. Step 4: Simplify right side
   424,484.69x = 89,280,945,832.97
5. Step 5: Solve for x
   x = 89,280,945,832.97/424,484.69
6. Step 6: Final answer
   x = 210,327.84