Finding the Fourth Proportional to 230,028.24, 317,435.72 and 129,426

Step by Step Solution

1. Step 1: Write the proportion equation
   230,028.24 : 317,435.72 = 129,426 : x
2. Step 2: Convert to fraction form
   230,028.24/317,435.72 = 129,426/x
3. Step 3: Cross multiply
   230,028.24x = 317,435.72 × 129,426
4. Step 4: Simplify right side
   230,028.24x = 41,084,435,496.72
5. Step 5: Solve for x
   x = 41,084,435,496.72/230,028.24
6. Step 6: Final answer
   x = 178,606.05