Finding the Fourth Proportional to 342,215.69, 472,260.78 and 189,245.97

Step by Step Solution

1. Step 1: Write the proportion equation
   342,215.69 : 472,260.78 = 189,245.97 : x
2. Step 2: Convert to fraction form
   342,215.69/472,260.78 = 189,245.97/x
3. Step 3: Cross multiply
   342,215.69x = 472,260.78 × 189,245.97
4. Step 4: Simplify right side
   342,215.69x = 89,373,449,404.06
5. Step 5: Solve for x
   x = 89,373,449,404.06/342,215.69
6. Step 6: Final answer
   x = 261,161.17