Finding the Fourth Proportional to 424,037.82, 636,150.49 and 139,716.89

Step by Step Solution

1. Step 1: Write the proportion equation
   424,037.82 : 636,150.49 = 139,716.89 : x
2. Step 2: Convert to fraction form
   424,037.82/636,150.49 = 139,716.89/x
3. Step 3: Cross multiply
   424,037.82x = 636,150.49 × 139,716.89
4. Step 4: Simplify right side
   424,037.82x = 88,880,968,034.78
5. Step 5: Solve for x
   x = 88,880,968,034.78/424,037.82
6. Step 6: Final answer
   x = 209,606.23