Finding the Fourth Proportional to 235,929.72, 325,581.35 and 128,499.42

Step by Step Solution

1. Step 1: Write the proportion equation
   235,929.72 : 325,581.35 = 128,499.42 : x
2. Step 2: Convert to fraction form
   235,929.72/325,581.35 = 128,499.42/x
3. Step 3: Cross multiply
   235,929.72x = 325,581.35 × 128,499.42
4. Step 4: Simplify right side
   235,929.72x = 41,837,013,995.32
5. Step 5: Solve for x
   x = 41,837,013,995.32/235,929.72
6. Step 6: Final answer
   x = 177,328.29