Finding the Fourth Proportional to 229,902.72, 317,268.64 and 129,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   229,902.72 : 317,268.64 = 129,300.72 : x
2. Step 2: Convert to fraction form
   229,902.72/317,268.64 = 129,300.72/x
3. Step 3: Cross multiply
   229,902.72x = 317,268.64 × 129,300.72
4. Step 4: Simplify right side
   229,902.72x = 41,023,063,585.42
5. Step 5: Solve for x
   x = 41,023,063,585.42/229,902.72
6. Step 6: Final answer
   x = 178,436.62