Finding the Fourth Proportional to 229,881.72, 317,233.72 and 129,279.72

Step by Step Solution

1. Step 1: Write the proportion equation
   229,881.72 : 317,233.72 = 129,279.72 : x
2. Step 2: Convert to fraction form
   229,881.72/317,233.72 = 129,279.72/x
3. Step 3: Cross multiply
   229,881.72x = 317,233.72 × 129,279.72
4. Step 4: Simplify right side
   229,881.72x = 41,011,886,496.16
5. Step 5: Solve for x
   x = 41,011,886,496.16/229,881.72
6. Step 6: Final answer
   x = 178,404.30