Finding the Fourth Proportional to 218,636.04, 301,665 and 123,142.68

Step by Step Solution

1. Step 1: Write the proportion equation
   218,636.04 : 301,665 = 123,142.68 : x
2. Step 2: Convert to fraction form
   218,636.04/301,665 = 123,142.68/x
3. Step 3: Cross multiply
   218,636.04x = 301,665 × 123,142.68
4. Step 4: Simplify right side
   218,636.04x = 37,147,836,562.20
5. Step 5: Solve for x
   x = 37,147,836,562.20/218,636.04
6. Step 6: Final answer
   x = 169,907.20