Finding the Fourth Proportional to 441,635.69, 662,453.83 and 142,116.21

Step by Step Solution

1. Step 1: Write the proportion equation
   441,635.69 : 662,453.83 = 142,116.21 : x
2. Step 2: Convert to fraction form
   441,635.69/662,453.83 = 142,116.21/x
3. Step 3: Cross multiply
   441,635.69x = 662,453.83 × 142,116.21
4. Step 4: Simplify right side
   441,635.69x = 94,145,431,307.56
5. Step 5: Solve for x
   x = 94,145,431,307.56/441,635.69
6. Step 6: Final answer
   x = 213,174.42